QnA fy - Recent activity in Trigonometry

QnA fy - Recent activity in Trigonometry https://qnafy.com/activity/math/trigonometry Powered by Question2Answer Answer selected: একটি ঘরের ছাদের কোনো বিন্দুতে ঐ বিন্দু থেকে $20$ মিটার দূরের ভূতলস্ত একটি বিন্দুর অবনতি কোণ $30^\circ$ হলে, ঘরটির উচ্চতা নির্ণয় কর। https://qnafy.com/16976/%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%98%E0%A6%B0%E0%A7%87%E0%A6%B0-%E0%A6%9B%E0%A6%BE%E0%A6%A6%E0%A7%87%E0%A6%B0-%E0%A6%95%E0%A7%8B%E0%A6%A8%E0%A7%8B-%E0%A6%AC%E0%A6%BF%E0%A6%A8%E0%A7%8D%E0%A6%A6%E0%A7%81%E0%A6%A4%E0%A7%87-%E0%A6%90-%E0%A6%AC%E0%A6%BF%E0%A6%A8%E0%A7%8D%E0%A6%A6%E0%A7%81-%E0%A6%A5%E0%A7%87%E0%A6%95%E0%A7%87-%2420%24-%E0%A6%AE%E0%A6%BF%E0%A6%9F%E0%A6%BE%E0%A6%B0-%E0%A6%A6%E0%A7%82%E0%A6%B0%E0%A7%87%E0%A6%B0-%E0%A6%AD%E0%A7%82%E0%A6%A4%E0%A6%B2%E0%A6%B8%E0%A7%8D%E0%A6%A4-%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%AC%E0%A6%BF%E0%A6%A8%E0%A7%8D%E0%A6%A6%E0%A7%81%E0%A6%B0-%E0%A6%85%E0%A6%AC%E0%A6%A8%E0%A6%A4%E0%A6%BF-%E0%A6%95%E0%A7%8B%E0%A6%A3-%2430-circ%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%98%E0%A6%B0%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%89%E0%A6%9A%E0%A7%8D%E0%A6%9A%E0%A6%A4%E0%A6%BE-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=17229#a17229 Trigonometry https://qnafy.com/16976/%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%98%E0%A6%B0%E0%A7%87%E0%A6%B0-%E0%A6%9B%E0%A6%BE%E0%A6%A6%E0%A7%87%E0%A6%B0-%E0%A6%95%E0%A7%8B%E0%A6%A8%E0%A7%8B-%E0%A6%AC%E0%A6%BF%E0%A6%A8%E0%A7%8D%E0%A6%A6%E0%A7%81%E0%A6%A4%E0%A7%87-%E0%A6%90-%E0%A6%AC%E0%A6%BF%E0%A6%A8%E0%A7%8D%E0%A6%A6%E0%A7%81-%E0%A6%A5%E0%A7%87%E0%A6%95%E0%A7%87-%2420%24-%E0%A6%AE%E0%A6%BF%E0%A6%9F%E0%A6%BE%E0%A6%B0-%E0%A6%A6%E0%A7%82%E0%A6%B0%E0%A7%87%E0%A6%B0-%E0%A6%AD%E0%A7%82%E0%A6%A4%E0%A6%B2%E0%A6%B8%E0%A7%8D%E0%A6%A4-%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%AC%E0%A6%BF%E0%A6%A8%E0%A7%8D%E0%A6%A6%E0%A7%81%E0%A6%B0-%E0%A6%85%E0%A6%AC%E0%A6%A8%E0%A6%A4%E0%A6%BF-%E0%A6%95%E0%A7%8B%E0%A6%A3-%2430-circ%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%98%E0%A6%B0%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%89%E0%A6%9A%E0%A7%8D%E0%A6%9A%E0%A6%A4%E0%A6%BE-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=17229#a17229 Sun, 21 Sep 2025 13:54:06 +0000 Answer selected: একটি গাছের পাদদেশ থেকে $20$ মিটার দূরে ভূতলের কোনো বিন্দুতে গাছের চূড়ার উন্নতি কোণ $60^\circ$ হলে, গাছটির উচ্চতা নির্ণয় কর। https://qnafy.com/16978/%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%97%E0%A6%BE%E0%A6%9B%E0%A7%87%E0%A6%B0-%E0%A6%AA%E0%A6%BE%E0%A6%A6%E0%A6%A6%E0%A7%87%E0%A6%B6-%E0%A6%A5%E0%A7%87%E0%A6%95%E0%A7%87-%2420%24-%E0%A6%AE%E0%A6%BF%E0%A6%9F%E0%A6%BE%E0%A6%B0-%E0%A6%A6%E0%A7%82%E0%A6%B0%E0%A7%87-%E0%A6%AD%E0%A7%82%E0%A6%A4%E0%A6%B2%E0%A7%87%E0%A6%B0-%E0%A6%95%E0%A7%8B%E0%A6%A8%E0%A7%8B-%E0%A6%AC%E0%A6%BF%E0%A6%A8%E0%A7%8D%E0%A6%A6%E0%A7%81%E0%A6%A4%E0%A7%87-%E0%A6%97%E0%A6%BE%E0%A6%9B%E0%A7%87%E0%A6%B0-%E0%A6%9A%E0%A7%82%E0%A7%9C%E0%A6%BE%E0%A6%B0-%E0%A6%89%E0%A6%A8%E0%A7%8D%E0%A6%A8%E0%A6%A4%E0%A6%BF-%E0%A6%95%E0%A7%8B%E0%A6%A3-%2460-circ%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%97%E0%A6%BE%E0%A6%9B%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%89%E0%A6%9A%E0%A7%8D%E0%A6%9A%E0%A6%A4%E0%A6%BE-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=17231#a17231 Trigonometry https://qnafy.com/16978/%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%97%E0%A6%BE%E0%A6%9B%E0%A7%87%E0%A6%B0-%E0%A6%AA%E0%A6%BE%E0%A6%A6%E0%A6%A6%E0%A7%87%E0%A6%B6-%E0%A6%A5%E0%A7%87%E0%A6%95%E0%A7%87-%2420%24-%E0%A6%AE%E0%A6%BF%E0%A6%9F%E0%A6%BE%E0%A6%B0-%E0%A6%A6%E0%A7%82%E0%A6%B0%E0%A7%87-%E0%A6%AD%E0%A7%82%E0%A6%A4%E0%A6%B2%E0%A7%87%E0%A6%B0-%E0%A6%95%E0%A7%8B%E0%A6%A8%E0%A7%8B-%E0%A6%AC%E0%A6%BF%E0%A6%A8%E0%A7%8D%E0%A6%A6%E0%A7%81%E0%A6%A4%E0%A7%87-%E0%A6%97%E0%A6%BE%E0%A6%9B%E0%A7%87%E0%A6%B0-%E0%A6%9A%E0%A7%82%E0%A7%9C%E0%A6%BE%E0%A6%B0-%E0%A6%89%E0%A6%A8%E0%A7%8D%E0%A6%A8%E0%A6%A4%E0%A6%BF-%E0%A6%95%E0%A7%8B%E0%A6%A3-%2460-circ%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%97%E0%A6%BE%E0%A6%9B%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%89%E0%A6%9A%E0%A7%8D%E0%A6%9A%E0%A6%A4%E0%A6%BE-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=17231#a17231 Sun, 21 Sep 2025 13:54:04 +0000 Answer selected: একটি মিনারের পাদদেশ থেকে কিছু দূরে একটি স্থানে মিনারটির শীর্ষের উন্নতি $30^\circ$ এবং মিনারটির উচ্চতা $26$ মিটার হলে, মিনার থেকে ঐ স্থানটির দূরত্ব নির্ণয় কর। https://qnafy.com/16979/%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%AE%E0%A6%BF%E0%A6%A8%E0%A6%BE%E0%A6%B0%E0%A7%87%E0%A6%B0-%E0%A6%AA%E0%A6%BE%E0%A6%A6%E0%A6%A6%E0%A7%87%E0%A6%B6-%E0%A6%A5%E0%A7%87%E0%A6%95%E0%A7%87-%E0%A6%95%E0%A6%BF%E0%A6%9B%E0%A7%81-%E0%A6%A6%E0%A7%82%E0%A6%B0%E0%A7%87-%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%B8%E0%A7%8D%E0%A6%A5%E0%A6%BE%E0%A6%A8%E0%A7%87-%E0%A6%AE%E0%A6%BF%E0%A6%A8%E0%A6%BE%E0%A6%B0%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%B6%E0%A7%80%E0%A6%B0%E0%A7%8D%E0%A6%B7%E0%A7%87%E0%A6%B0-%E0%A6%89%E0%A6%A8%E0%A7%8D%E0%A6%A8%E0%A6%A4%E0%A6%BF-%2430-circ%24-%E0%A6%8F%E0%A6%AC%E0%A6%82-%E0%A6%AE%E0%A6%BF%E0%A6%A8%E0%A6%BE%E0%A6%B0%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%89%E0%A6%9A%E0%A7%8D%E0%A6%9A%E0%A6%A4%E0%A6%BE-%2426%24-%E0%A6%AE%E0%A6%BF%E0%A6%9F%E0%A6%BE%E0%A6%B0-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%AE%E0%A6%BF%E0%A6%A8%E0%A6%BE%E0%A6%B0-%E0%A6%A5%E0%A7%87%E0%A6%95%E0%A7%87-%E0%A6%90-%E0%A6%B8%E0%A7%8D%E0%A6%A5%E0%A6%BE%E0%A6%A8%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%A6%E0%A7%82%E0%A6%B0%E0%A6%A4%E0%A7%8D%E0%A6%AC-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=17232#a17232 Trigonometry https://qnafy.com/16979/%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%AE%E0%A6%BF%E0%A6%A8%E0%A6%BE%E0%A6%B0%E0%A7%87%E0%A6%B0-%E0%A6%AA%E0%A6%BE%E0%A6%A6%E0%A6%A6%E0%A7%87%E0%A6%B6-%E0%A6%A5%E0%A7%87%E0%A6%95%E0%A7%87-%E0%A6%95%E0%A6%BF%E0%A6%9B%E0%A7%81-%E0%A6%A6%E0%A7%82%E0%A6%B0%E0%A7%87-%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%B8%E0%A7%8D%E0%A6%A5%E0%A6%BE%E0%A6%A8%E0%A7%87-%E0%A6%AE%E0%A6%BF%E0%A6%A8%E0%A6%BE%E0%A6%B0%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%B6%E0%A7%80%E0%A6%B0%E0%A7%8D%E0%A6%B7%E0%A7%87%E0%A6%B0-%E0%A6%89%E0%A6%A8%E0%A7%8D%E0%A6%A8%E0%A6%A4%E0%A6%BF-%2430-circ%24-%E0%A6%8F%E0%A6%AC%E0%A6%82-%E0%A6%AE%E0%A6%BF%E0%A6%A8%E0%A6%BE%E0%A6%B0%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%89%E0%A6%9A%E0%A7%8D%E0%A6%9A%E0%A6%A4%E0%A6%BE-%2426%24-%E0%A6%AE%E0%A6%BF%E0%A6%9F%E0%A6%BE%E0%A6%B0-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%AE%E0%A6%BF%E0%A6%A8%E0%A6%BE%E0%A6%B0-%E0%A6%A5%E0%A7%87%E0%A6%95%E0%A7%87-%E0%A6%90-%E0%A6%B8%E0%A7%8D%E0%A6%A5%E0%A6%BE%E0%A6%A8%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%A6%E0%A7%82%E0%A6%B0%E0%A6%A4%E0%A7%8D%E0%A6%AC-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=17232#a17232 Sun, 21 Sep 2025 13:54:01 +0000 Answer selected: একটি নদীর তীর কোনো এক স্থানে দাঁড়িয়ে একজন লোক দেখল যে, ঠিক সোজাসুজি অপর তীরে অবস্থিত একটি টাওয়ারের উন্নতি কোণ $60^\circ$। ঐ স্থান থেকে $32$ মিটার পিছিয়ে গেলে উন্নতি কোণ $30^\circ$ হয়। টাওয়ারের উচ্চতা এবং নদীর বিস্তার নির্ণয় কর।< https://qnafy.com/16973/%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%A8%E0%A6%A6%E0%A7%80%E0%A6%B0-%E0%A6%A4%E0%A7%80%E0%A6%B0-%E0%A6%95%E0%A7%8B%E0%A6%A8%E0%A7%8B-%E0%A6%8F%E0%A6%95-%E0%A6%B8%E0%A7%8D%E0%A6%A5%E0%A6%BE%E0%A6%A8%E0%A7%87-%E0%A6%A6%E0%A6%BE%E0%A6%81%E0%A7%9C%E0%A6%BF%E0%A7%9F%E0%A7%87-%E0%A6%8F%E0%A6%95%E0%A6%9C%E0%A6%A8-%E0%A6%B2%E0%A7%8B%E0%A6%95-%E0%A6%A6%E0%A7%87%E0%A6%96%E0%A6%B2-%E0%A6%AF%E0%A7%87-%E0%A6%A0%E0%A6%BF%E0%A6%95-%E0%A6%B8%E0%A7%8B%E0%A6%9C%E0%A6%BE%E0%A6%B8%E0%A7%81%E0%A6%9C%E0%A6%BF-%E0%A6%85%E0%A6%AA%E0%A6%B0-%E0%A6%A4%E0%A7%80%E0%A6%B0%E0%A7%87-%E0%A6%85%E0%A6%AC%E0%A6%B8%E0%A7%8D%E0%A6%A5%E0%A6%BF%E0%A6%A4-%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%9F%E0%A6%BE%E0%A6%93%E0%A7%9F%E0%A6%BE%E0%A6%B0%E0%A7%87%E0%A6%B0-%E0%A6%89%E0%A6%A8%E0%A7%8D%E0%A6%A8%E0%A6%A4%E0%A6%BF-%E0%A6%95%E0%A7%8B%E0%A6%A3-%2460-circ%24%E0%A5%A4-%E0%A6%90-%E0%A6%B8%E0%A7%8D%E0%A6%A5%E0%A6%BE%E0%A6%A8-%E0%A6%A5%E0%A7%87%E0%A6%95%E0%A7%87-%2432%24-%E0%A6%AE%E0%A6%BF%E0%A6%9F%E0%A6%BE%E0%A6%B0-%E0%A6%AA%E0%A6%BF%E0%A6%9B%E0%A6%BF%E0%A7%9F%E0%A7%87-%E0%A6%97%E0%A7%87%E0%A6%B2%E0%A7%87-%E0%A6%89%E0%A6%A8%E0%A7%8D%E0%A6%A8%E0%A6%A4%E0%A6%BF-%E0%A6%95%E0%A7%8B%E0%A6%A3-%2430-circ%24-%E0%A6%B9%E0%A7%9F%E0%A5%A4-%E0%A6%9F%E0%A6%BE%E0%A6%93%E0%A7%9F%E0%A6%BE%E0%A6%B0%E0%A7%87%E0%A6%B0-%E0%A6%89%E0%A6%9A%E0%A7%8D%E0%A6%9A%E0%A6%A4%E0%A6%BE-%E0%A6%8F%E0%A6%AC%E0%A6%82-%E0%A6%A8%E0%A6%A6%E0%A7%80%E0%A6%B0-%E0%A6%AC%E0%A6%BF%E0%A6%B8%E0%A7%8D%E0%A6%A4%E0%A6%BE%E0%A6%B0-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=17226#a17226 Trigonometry https://qnafy.com/16973/%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%A8%E0%A6%A6%E0%A7%80%E0%A6%B0-%E0%A6%A4%E0%A7%80%E0%A6%B0-%E0%A6%95%E0%A7%8B%E0%A6%A8%E0%A7%8B-%E0%A6%8F%E0%A6%95-%E0%A6%B8%E0%A7%8D%E0%A6%A5%E0%A6%BE%E0%A6%A8%E0%A7%87-%E0%A6%A6%E0%A6%BE%E0%A6%81%E0%A7%9C%E0%A6%BF%E0%A7%9F%E0%A7%87-%E0%A6%8F%E0%A6%95%E0%A6%9C%E0%A6%A8-%E0%A6%B2%E0%A7%8B%E0%A6%95-%E0%A6%A6%E0%A7%87%E0%A6%96%E0%A6%B2-%E0%A6%AF%E0%A7%87-%E0%A6%A0%E0%A6%BF%E0%A6%95-%E0%A6%B8%E0%A7%8B%E0%A6%9C%E0%A6%BE%E0%A6%B8%E0%A7%81%E0%A6%9C%E0%A6%BF-%E0%A6%85%E0%A6%AA%E0%A6%B0-%E0%A6%A4%E0%A7%80%E0%A6%B0%E0%A7%87-%E0%A6%85%E0%A6%AC%E0%A6%B8%E0%A7%8D%E0%A6%A5%E0%A6%BF%E0%A6%A4-%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%9F%E0%A6%BE%E0%A6%93%E0%A7%9F%E0%A6%BE%E0%A6%B0%E0%A7%87%E0%A6%B0-%E0%A6%89%E0%A6%A8%E0%A7%8D%E0%A6%A8%E0%A6%A4%E0%A6%BF-%E0%A6%95%E0%A7%8B%E0%A6%A3-%2460-circ%24%E0%A5%A4-%E0%A6%90-%E0%A6%B8%E0%A7%8D%E0%A6%A5%E0%A6%BE%E0%A6%A8-%E0%A6%A5%E0%A7%87%E0%A6%95%E0%A7%87-%2432%24-%E0%A6%AE%E0%A6%BF%E0%A6%9F%E0%A6%BE%E0%A6%B0-%E0%A6%AA%E0%A6%BF%E0%A6%9B%E0%A6%BF%E0%A7%9F%E0%A7%87-%E0%A6%97%E0%A7%87%E0%A6%B2%E0%A7%87-%E0%A6%89%E0%A6%A8%E0%A7%8D%E0%A6%A8%E0%A6%A4%E0%A6%BF-%E0%A6%95%E0%A7%8B%E0%A6%A3-%2430-circ%24-%E0%A6%B9%E0%A7%9F%E0%A5%A4-%E0%A6%9F%E0%A6%BE%E0%A6%93%E0%A7%9F%E0%A6%BE%E0%A6%B0%E0%A7%87%E0%A6%B0-%E0%A6%89%E0%A6%9A%E0%A7%8D%E0%A6%9A%E0%A6%A4%E0%A6%BE-%E0%A6%8F%E0%A6%AC%E0%A6%82-%E0%A6%A8%E0%A6%A6%E0%A7%80%E0%A6%B0-%E0%A6%AC%E0%A6%BF%E0%A6%B8%E0%A7%8D%E0%A6%A4%E0%A6%BE%E0%A6%B0-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=17226#a17226 Sun, 21 Sep 2025 13:53:57 +0000 Answer selected: ভূতলে কোনো স্থানে একটি স্তম্ভের শীর্ষের উন্নতি $60^\circ$। ঐ স্থান থেকে $25$ মিটার পিছিয়ে গেলে স্থম্ভটির উন্নতি কোণ $30^\circ$ হয়। স্তম্ভটির উচ্চতা নির্ণয় কর। https://qnafy.com/16975/%E0%A6%AD%E0%A7%82%E0%A6%A4%E0%A6%B2%E0%A7%87-%E0%A6%95%E0%A7%8B%E0%A6%A8%E0%A7%8B-%E0%A6%B8%E0%A7%8D%E0%A6%A5%E0%A6%BE%E0%A6%A8%E0%A7%87-%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%B8%E0%A7%8D%E0%A6%A4%E0%A6%AE%E0%A7%8D%E0%A6%AD%E0%A7%87%E0%A6%B0-%E0%A6%B6%E0%A7%80%E0%A6%B0%E0%A7%8D%E0%A6%B7%E0%A7%87%E0%A6%B0-%E0%A6%89%E0%A6%A8%E0%A7%8D%E0%A6%A8%E0%A6%A4%E0%A6%BF-%2460-circ%24%E0%A5%A4-%E0%A6%90-%E0%A6%B8%E0%A7%8D%E0%A6%A5%E0%A6%BE%E0%A6%A8-%E0%A6%A5%E0%A7%87%E0%A6%95%E0%A7%87-%2425%24-%E0%A6%AE%E0%A6%BF%E0%A6%9F%E0%A6%BE%E0%A6%B0-%E0%A6%AA%E0%A6%BF%E0%A6%9B%E0%A6%BF%E0%A7%9F%E0%A7%87-%E0%A6%97%E0%A7%87%E0%A6%B2%E0%A7%87-%E0%A6%B8%E0%A7%8D%E0%A6%A5%E0%A6%AE%E0%A7%8D%E0%A6%AD%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%89%E0%A6%A8%E0%A7%8D%E0%A6%A8%E0%A6%A4%E0%A6%BF-%E0%A6%95%E0%A7%8B%E0%A6%A3-%2430-circ%24-%E0%A6%B9%E0%A7%9F%E0%A5%A4-%E0%A6%B8%E0%A7%8D%E0%A6%A4%E0%A6%AE%E0%A7%8D%E0%A6%AD%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%89%E0%A6%9A%E0%A7%8D%E0%A6%9A%E0%A6%A4%E0%A6%BE-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=17228#a17228 Trigonometry https://qnafy.com/16975/%E0%A6%AD%E0%A7%82%E0%A6%A4%E0%A6%B2%E0%A7%87-%E0%A6%95%E0%A7%8B%E0%A6%A8%E0%A7%8B-%E0%A6%B8%E0%A7%8D%E0%A6%A5%E0%A6%BE%E0%A6%A8%E0%A7%87-%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%B8%E0%A7%8D%E0%A6%A4%E0%A6%AE%E0%A7%8D%E0%A6%AD%E0%A7%87%E0%A6%B0-%E0%A6%B6%E0%A7%80%E0%A6%B0%E0%A7%8D%E0%A6%B7%E0%A7%87%E0%A6%B0-%E0%A6%89%E0%A6%A8%E0%A7%8D%E0%A6%A8%E0%A6%A4%E0%A6%BF-%2460-circ%24%E0%A5%A4-%E0%A6%90-%E0%A6%B8%E0%A7%8D%E0%A6%A5%E0%A6%BE%E0%A6%A8-%E0%A6%A5%E0%A7%87%E0%A6%95%E0%A7%87-%2425%24-%E0%A6%AE%E0%A6%BF%E0%A6%9F%E0%A6%BE%E0%A6%B0-%E0%A6%AA%E0%A6%BF%E0%A6%9B%E0%A6%BF%E0%A7%9F%E0%A7%87-%E0%A6%97%E0%A7%87%E0%A6%B2%E0%A7%87-%E0%A6%B8%E0%A7%8D%E0%A6%A5%E0%A6%AE%E0%A7%8D%E0%A6%AD%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%89%E0%A6%A8%E0%A7%8D%E0%A6%A8%E0%A6%A4%E0%A6%BF-%E0%A6%95%E0%A7%8B%E0%A6%A3-%2430-circ%24-%E0%A6%B9%E0%A7%9F%E0%A5%A4-%E0%A6%B8%E0%A7%8D%E0%A6%A4%E0%A6%AE%E0%A7%8D%E0%A6%AD%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%89%E0%A6%9A%E0%A7%8D%E0%A6%9A%E0%A6%A4%E0%A6%BE-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=17228#a17228 Sun, 21 Sep 2025 13:53:53 +0000 Answer selected: কোনো স্থান থেকে একটি মিনারের দিকে $60$ মিটার এগিয়ে আসলে মিনারের শীর্ষ বিন্দুর উন্নতি $45^\circ$ থেকে $60^\circ$ হয়। মিনারটির উচ্চতা নির্ণয় কর। https://qnafy.com/16974/%E0%A6%95%E0%A7%8B%E0%A6%A8%E0%A7%8B-%E0%A6%B8%E0%A7%8D%E0%A6%A5%E0%A6%BE%E0%A6%A8-%E0%A6%A5%E0%A7%87%E0%A6%95%E0%A7%87-%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%AE%E0%A6%BF%E0%A6%A8%E0%A6%BE%E0%A6%B0%E0%A7%87%E0%A6%B0-%E0%A6%A6%E0%A6%BF%E0%A6%95%E0%A7%87-%2460%24-%E0%A6%AE%E0%A6%BF%E0%A6%9F%E0%A6%BE%E0%A6%B0-%E0%A6%8F%E0%A6%97%E0%A6%BF%E0%A7%9F%E0%A7%87-%E0%A6%86%E0%A6%B8%E0%A6%B2%E0%A7%87-%E0%A6%AE%E0%A6%BF%E0%A6%A8%E0%A6%BE%E0%A6%B0%E0%A7%87%E0%A6%B0-%E0%A6%B6%E0%A7%80%E0%A6%B0%E0%A7%8D%E0%A6%B7-%E0%A6%AC%E0%A6%BF%E0%A6%A8%E0%A7%8D%E0%A6%A6%E0%A7%81%E0%A6%B0-%E0%A6%89%E0%A6%A8%E0%A7%8D%E0%A6%A8%E0%A6%A4%E0%A6%BF-%2445-circ%24-%E0%A6%A5%E0%A7%87%E0%A6%95%E0%A7%87-%2460-circ%24-%E0%A6%B9%E0%A7%9F%E0%A5%A4-%E0%A6%AE%E0%A6%BF%E0%A6%A8%E0%A6%BE%E0%A6%B0%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%89%E0%A6%9A%E0%A7%8D%E0%A6%9A%E0%A6%A4%E0%A6%BE-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=17227#a17227 Trigonometry https://qnafy.com/16974/%E0%A6%95%E0%A7%8B%E0%A6%A8%E0%A7%8B-%E0%A6%B8%E0%A7%8D%E0%A6%A5%E0%A6%BE%E0%A6%A8-%E0%A6%A5%E0%A7%87%E0%A6%95%E0%A7%87-%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%AE%E0%A6%BF%E0%A6%A8%E0%A6%BE%E0%A6%B0%E0%A7%87%E0%A6%B0-%E0%A6%A6%E0%A6%BF%E0%A6%95%E0%A7%87-%2460%24-%E0%A6%AE%E0%A6%BF%E0%A6%9F%E0%A6%BE%E0%A6%B0-%E0%A6%8F%E0%A6%97%E0%A6%BF%E0%A7%9F%E0%A7%87-%E0%A6%86%E0%A6%B8%E0%A6%B2%E0%A7%87-%E0%A6%AE%E0%A6%BF%E0%A6%A8%E0%A6%BE%E0%A6%B0%E0%A7%87%E0%A6%B0-%E0%A6%B6%E0%A7%80%E0%A6%B0%E0%A7%8D%E0%A6%B7-%E0%A6%AC%E0%A6%BF%E0%A6%A8%E0%A7%8D%E0%A6%A6%E0%A7%81%E0%A6%B0-%E0%A6%89%E0%A6%A8%E0%A7%8D%E0%A6%A8%E0%A6%A4%E0%A6%BF-%2445-circ%24-%E0%A6%A5%E0%A7%87%E0%A6%95%E0%A7%87-%2460-circ%24-%E0%A6%B9%E0%A7%9F%E0%A5%A4-%E0%A6%AE%E0%A6%BF%E0%A6%A8%E0%A6%BE%E0%A6%B0%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%89%E0%A6%9A%E0%A7%8D%E0%A6%9A%E0%A6%A4%E0%A6%BE-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=17227#a17227 Sun, 21 Sep 2025 13:53:49 +0000 Answer selected: $18$ মিটার দৈর্ঘ্য একটি মই ভূমির সাথে $45^\circ$ কোণ উৎপন্ন করে দেওয়ালের ছাদ স্পর্শ করে। দেওয়ালটির উচ্চতা নির্ণয় কর। https://qnafy.com/16977/%2418%24-%E0%A6%AE%E0%A6%BF%E0%A6%9F%E0%A6%BE%E0%A6%B0-%E0%A6%A6%E0%A7%88%E0%A6%B0%E0%A7%8D%E0%A6%98%E0%A7%8D%E0%A6%AF-%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%AE%E0%A6%87-%E0%A6%AD%E0%A7%82%E0%A6%AE%E0%A6%BF%E0%A6%B0-%E0%A6%B8%E0%A6%BE%E0%A6%A5%E0%A7%87-%2445-circ%24-%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%89%E0%A7%8E%E0%A6%AA%E0%A6%A8%E0%A7%8D%E0%A6%A8-%E0%A6%95%E0%A6%B0%E0%A7%87-%E0%A6%A6%E0%A7%87%E0%A6%93%E0%A7%9F%E0%A6%BE%E0%A6%B2%E0%A7%87%E0%A6%B0-%E0%A6%9B%E0%A6%BE%E0%A6%A6-%E0%A6%B8%E0%A7%8D%E0%A6%AA%E0%A6%B0%E0%A7%8D%E0%A6%B6-%E0%A6%95%E0%A6%B0%E0%A7%87%E0%A5%A4-%E0%A6%A6%E0%A7%87%E0%A6%93%E0%A7%9F%E0%A6%BE%E0%A6%B2%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%89%E0%A6%9A%E0%A7%8D%E0%A6%9A%E0%A6%A4%E0%A6%BE-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=17230#a17230 Trigonometry https://qnafy.com/16977/%2418%24-%E0%A6%AE%E0%A6%BF%E0%A6%9F%E0%A6%BE%E0%A6%B0-%E0%A6%A6%E0%A7%88%E0%A6%B0%E0%A7%8D%E0%A6%98%E0%A7%8D%E0%A6%AF-%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%AE%E0%A6%87-%E0%A6%AD%E0%A7%82%E0%A6%AE%E0%A6%BF%E0%A6%B0-%E0%A6%B8%E0%A6%BE%E0%A6%A5%E0%A7%87-%2445-circ%24-%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%89%E0%A7%8E%E0%A6%AA%E0%A6%A8%E0%A7%8D%E0%A6%A8-%E0%A6%95%E0%A6%B0%E0%A7%87-%E0%A6%A6%E0%A7%87%E0%A6%93%E0%A7%9F%E0%A6%BE%E0%A6%B2%E0%A7%87%E0%A6%B0-%E0%A6%9B%E0%A6%BE%E0%A6%A6-%E0%A6%B8%E0%A7%8D%E0%A6%AA%E0%A6%B0%E0%A7%8D%E0%A6%B6-%E0%A6%95%E0%A6%B0%E0%A7%87%E0%A5%A4-%E0%A6%A6%E0%A7%87%E0%A6%93%E0%A7%9F%E0%A6%BE%E0%A6%B2%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%89%E0%A6%9A%E0%A7%8D%E0%A6%9A%E0%A6%A4%E0%A6%BE-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=17230#a17230 Sun, 21 Sep 2025 13:53:42 +0000 Answer selected: $64$ মিটার লম্বা একটি খুঁটি ভেঙে গিয়ে সম্পূর্ণ বিচ্ছিন্ন না হয়ে ভূমির সাথে $60^\circ$ উৎপন্ন করে। খুঁটিটির ভাঙা অংশের দৈর্ঘ্য নির্ণয় কর। https://qnafy.com/16972/%2464%24-%E0%A6%AE%E0%A6%BF%E0%A6%9F%E0%A6%BE%E0%A6%B0-%E0%A6%B2%E0%A6%AE%E0%A7%8D%E0%A6%AC%E0%A6%BE-%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%96%E0%A7%81%E0%A6%81%E0%A6%9F%E0%A6%BF-%E0%A6%AD%E0%A7%87%E0%A6%99%E0%A7%87-%E0%A6%97%E0%A6%BF%E0%A7%9F%E0%A7%87-%E0%A6%B8%E0%A6%AE%E0%A7%8D%E0%A6%AA%E0%A7%82%E0%A6%B0%E0%A7%8D%E0%A6%A3-%E0%A6%AC%E0%A6%BF%E0%A6%9A%E0%A7%8D%E0%A6%9B%E0%A6%BF%E0%A6%A8%E0%A7%8D%E0%A6%A8-%E0%A6%A8%E0%A6%BE-%E0%A6%B9%E0%A7%9F%E0%A7%87-%E0%A6%AD%E0%A7%82%E0%A6%AE%E0%A6%BF%E0%A6%B0-%E0%A6%B8%E0%A6%BE%E0%A6%A5%E0%A7%87-%2460-circ%24-%E0%A6%89%E0%A7%8E%E0%A6%AA%E0%A6%A8%E0%A7%8D%E0%A6%A8-%E0%A6%95%E0%A6%B0%E0%A7%87%E0%A5%A4-%E0%A6%96%E0%A7%81%E0%A6%81%E0%A6%9F%E0%A6%BF%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%AD%E0%A6%BE%E0%A6%99%E0%A6%BE-%E0%A6%85%E0%A6%82%E0%A6%B6%E0%A7%87%E0%A6%B0-%E0%A6%A6%E0%A7%88%E0%A6%B0%E0%A7%8D%E0%A6%98%E0%A7%8D%E0%A6%AF-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=17225#a17225 Trigonometry https://qnafy.com/16972/%2464%24-%E0%A6%AE%E0%A6%BF%E0%A6%9F%E0%A6%BE%E0%A6%B0-%E0%A6%B2%E0%A6%AE%E0%A7%8D%E0%A6%AC%E0%A6%BE-%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%96%E0%A7%81%E0%A6%81%E0%A6%9F%E0%A6%BF-%E0%A6%AD%E0%A7%87%E0%A6%99%E0%A7%87-%E0%A6%97%E0%A6%BF%E0%A7%9F%E0%A7%87-%E0%A6%B8%E0%A6%AE%E0%A7%8D%E0%A6%AA%E0%A7%82%E0%A6%B0%E0%A7%8D%E0%A6%A3-%E0%A6%AC%E0%A6%BF%E0%A6%9A%E0%A7%8D%E0%A6%9B%E0%A6%BF%E0%A6%A8%E0%A7%8D%E0%A6%A8-%E0%A6%A8%E0%A6%BE-%E0%A6%B9%E0%A7%9F%E0%A7%87-%E0%A6%AD%E0%A7%82%E0%A6%AE%E0%A6%BF%E0%A6%B0-%E0%A6%B8%E0%A6%BE%E0%A6%A5%E0%A7%87-%2460-circ%24-%E0%A6%89%E0%A7%8E%E0%A6%AA%E0%A6%A8%E0%A7%8D%E0%A6%A8-%E0%A6%95%E0%A6%B0%E0%A7%87%E0%A5%A4-%E0%A6%96%E0%A7%81%E0%A6%81%E0%A6%9F%E0%A6%BF%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%AD%E0%A6%BE%E0%A6%99%E0%A6%BE-%E0%A6%85%E0%A6%82%E0%A6%B6%E0%A7%87%E0%A6%B0-%E0%A6%A6%E0%A7%88%E0%A6%B0%E0%A7%8D%E0%A6%98%E0%A7%8D%E0%A6%AF-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=17225#a17225 Sun, 21 Sep 2025 13:53:36 +0000 Answer selected: একটি গাছ ঝড়ে এমনভাবে ভেঙে গেল যে, ভাঙা অংশ দণ্ডায়মান অংশের সাথে $30^\circ$ কোণ করে গাছের গোড়া থেকে $12$ মিটার দূরে মাটি স্পর্শ করে। সম্পূর্ণ গাছটির দৈর্ঘ্য নির্ণয় কর। https://qnafy.com/16971/%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%97%E0%A6%BE%E0%A6%9B-%E0%A6%9D%E0%A7%9C%E0%A7%87-%E0%A6%8F%E0%A6%AE%E0%A6%A8%E0%A6%AD%E0%A6%BE%E0%A6%AC%E0%A7%87-%E0%A6%AD%E0%A7%87%E0%A6%99%E0%A7%87-%E0%A6%97%E0%A7%87%E0%A6%B2-%E0%A6%AF%E0%A7%87-%E0%A6%AD%E0%A6%BE%E0%A6%99%E0%A6%BE-%E0%A6%85%E0%A6%82%E0%A6%B6-%E0%A6%A6%E0%A6%A3%E0%A7%8D%E0%A6%A1%E0%A6%BE%E0%A7%9F%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%85%E0%A6%82%E0%A6%B6%E0%A7%87%E0%A6%B0-%E0%A6%B8%E0%A6%BE%E0%A6%A5%E0%A7%87-%2430-circ%24-%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%95%E0%A6%B0%E0%A7%87-%E0%A6%97%E0%A6%BE%E0%A6%9B%E0%A7%87%E0%A6%B0-%E0%A6%97%E0%A7%8B%E0%A7%9C%E0%A6%BE-%E0%A6%A5%E0%A7%87%E0%A6%95%E0%A7%87-%2412%24-%E0%A6%AE%E0%A6%BF%E0%A6%9F%E0%A6%BE%E0%A6%B0-%E0%A6%A6%E0%A7%82%E0%A6%B0%E0%A7%87-%E0%A6%AE%E0%A6%BE%E0%A6%9F%E0%A6%BF-%E0%A6%B8%E0%A7%8D%E0%A6%AA%E0%A6%B0%E0%A7%8D%E0%A6%B6-%E0%A6%95%E0%A6%B0%E0%A7%87%E0%A5%A4-%E0%A6%B8%E0%A6%AE%E0%A7%8D%E0%A6%AA%E0%A7%82%E0%A6%B0%E0%A7%8D%E0%A6%A3-%E0%A6%97%E0%A6%BE%E0%A6%9B%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%A6%E0%A7%88%E0%A6%B0%E0%A7%8D%E0%A6%98%E0%A7%8D%E0%A6%AF-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=17224#a17224 Trigonometry https://qnafy.com/16971/%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%97%E0%A6%BE%E0%A6%9B-%E0%A6%9D%E0%A7%9C%E0%A7%87-%E0%A6%8F%E0%A6%AE%E0%A6%A8%E0%A6%AD%E0%A6%BE%E0%A6%AC%E0%A7%87-%E0%A6%AD%E0%A7%87%E0%A6%99%E0%A7%87-%E0%A6%97%E0%A7%87%E0%A6%B2-%E0%A6%AF%E0%A7%87-%E0%A6%AD%E0%A6%BE%E0%A6%99%E0%A6%BE-%E0%A6%85%E0%A6%82%E0%A6%B6-%E0%A6%A6%E0%A6%A3%E0%A7%8D%E0%A6%A1%E0%A6%BE%E0%A7%9F%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%85%E0%A6%82%E0%A6%B6%E0%A7%87%E0%A6%B0-%E0%A6%B8%E0%A6%BE%E0%A6%A5%E0%A7%87-%2430-circ%24-%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%95%E0%A6%B0%E0%A7%87-%E0%A6%97%E0%A6%BE%E0%A6%9B%E0%A7%87%E0%A6%B0-%E0%A6%97%E0%A7%8B%E0%A7%9C%E0%A6%BE-%E0%A6%A5%E0%A7%87%E0%A6%95%E0%A7%87-%2412%24-%E0%A6%AE%E0%A6%BF%E0%A6%9F%E0%A6%BE%E0%A6%B0-%E0%A6%A6%E0%A7%82%E0%A6%B0%E0%A7%87-%E0%A6%AE%E0%A6%BE%E0%A6%9F%E0%A6%BF-%E0%A6%B8%E0%A7%8D%E0%A6%AA%E0%A6%B0%E0%A7%8D%E0%A6%B6-%E0%A6%95%E0%A6%B0%E0%A7%87%E0%A5%A4-%E0%A6%B8%E0%A6%AE%E0%A7%8D%E0%A6%AA%E0%A7%82%E0%A6%B0%E0%A7%8D%E0%A6%A3-%E0%A6%97%E0%A6%BE%E0%A6%9B%E0%A6%9F%E0%A6%BF%E0%A6%B0-%E0%A6%A6%E0%A7%88%E0%A6%B0%E0%A7%8D%E0%A6%98%E0%A7%8D%E0%A6%AF-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=17224#a17224 Sun, 07 Sep 2025 13:43:46 +0000 Answer selected: উন্নতি কোণ কাকে বলা হয়? https://qnafy.com/16737/%E0%A6%89%E0%A6%A8%E0%A7%8D%E0%A6%A8%E0%A6%A4%E0%A6%BF-%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%95%E0%A6%BE%E0%A6%95%E0%A7%87-%E0%A6%AC%E0%A6%B2%E0%A6%BE-%E0%A6%B9%E0%A7%9F?show=16738#a16738 Trigonometry https://qnafy.com/16737/%E0%A6%89%E0%A6%A8%E0%A7%8D%E0%A6%A8%E0%A6%A4%E0%A6%BF-%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%95%E0%A6%BE%E0%A6%95%E0%A7%87-%E0%A6%AC%E0%A6%B2%E0%A6%BE-%E0%A6%B9%E0%A7%9F?show=16738#a16738 Sun, 31 Aug 2025 08:47:11 +0000 Answer selected: অবনতি কোণ কাকে বলা হয়? https://qnafy.com/16739/%E0%A6%85%E0%A6%AC%E0%A6%A8%E0%A6%A4%E0%A6%BF-%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%95%E0%A6%BE%E0%A6%95%E0%A7%87-%E0%A6%AC%E0%A6%B2%E0%A6%BE-%E0%A6%B9%E0%A7%9F?show=16740#a16740 Trigonometry https://qnafy.com/16739/%E0%A6%85%E0%A6%AC%E0%A6%A8%E0%A6%A4%E0%A6%BF-%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%95%E0%A6%BE%E0%A6%95%E0%A7%87-%E0%A6%AC%E0%A6%B2%E0%A6%BE-%E0%A6%B9%E0%A7%9F?show=16740#a16740 Sun, 31 Aug 2025 08:47:09 +0000 Answer selected: ভূরেখার অপর নাম কী? https://qnafy.com/16741/%E0%A6%AD%E0%A7%82%E0%A6%B0%E0%A7%87%E0%A6%96%E0%A6%BE%E0%A6%B0-%E0%A6%85%E0%A6%AA%E0%A6%B0-%E0%A6%A8%E0%A6%BE%E0%A6%AE-%E0%A6%95%E0%A7%80?show=16742#a16742 Trigonometry https://qnafy.com/16741/%E0%A6%AD%E0%A7%82%E0%A6%B0%E0%A7%87%E0%A6%96%E0%A6%BE%E0%A6%B0-%E0%A6%85%E0%A6%AA%E0%A6%B0-%E0%A6%A8%E0%A6%BE%E0%A6%AE-%E0%A6%95%E0%A7%80?show=16742#a16742 Sun, 31 Aug 2025 08:47:07 +0000 Answer selected: যদি $sin\theta+cos\theta=a$ হয়, তবে $sin^4\theta+cos^4\theta$ এর মান কত? https://qnafy.com/14905/%E0%A6%AF%E0%A6%A6%E0%A6%BF-%24sin-theta-cos-theta-a%24-%E0%A6%B9%E0%A7%9F-%E0%A6%A4%E0%A6%AC%E0%A7%87-%24sin-4-theta-cos-4-theta%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%95%E0%A6%A4?show=14906#a14906 Trigonometry https://qnafy.com/14905/%E0%A6%AF%E0%A6%A6%E0%A6%BF-%24sin-theta-cos-theta-a%24-%E0%A6%B9%E0%A7%9F-%E0%A6%A4%E0%A6%AC%E0%A7%87-%24sin-4-theta-cos-4-theta%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%95%E0%A6%A4?show=14906#a14906 Mon, 28 Jul 2025 01:45:21 +0000 Answer selected: $cot90^{\circ}\cdot tan0^{\circ}\cdot $$sec30^{\circ}\cdot cosec60^{\circ}$ এর মান নির্ণয় কর। https://qnafy.com/14326/%24cot90-circ-cdot-tan0-circ-cdot-%24%24sec30-circ-cdot-cosec60-circ-%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=14334#a14334 Trigonometry https://qnafy.com/14326/%24cot90-circ-cdot-tan0-circ-cdot-%24%24sec30-circ-cdot-cosec60-circ-%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=14334#a14334 Mon, 07 Jul 2025 02:12:11 +0000 Answer selected: $sin60^{\circ}\cdot cos30^{\circ}$$ + sec60^{\circ}\cdot sin30^{\circ}$ এর মান নির্ণয় কর। https://qnafy.com/14327/%24sin60-circ-cdot-cos30-circ-%24%24-sec60-circ-cdot-sin30-circ-%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=14336#a14336 Trigonometry https://qnafy.com/14327/%24sin60-circ-cdot-cos30-circ-%24%24-sec60-circ-cdot-sin30-circ-%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=14336#a14336 Mon, 07 Jul 2025 02:12:06 +0000 Answer selected: $\frac{1-sin^245^{\circ}}{1+sin^245^{\circ}}+tan^245^{\circ}$ এর মান নির্ণয় কর। https://qnafy.com/14325/%24-frac-1-sin-245-circ-1-sin-245-circ-tan-245-circ-%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=14332#a14332 Trigonometry https://qnafy.com/14325/%24-frac-1-sin-245-circ-1-sin-245-circ-tan-245-circ-%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=14332#a14332 Mon, 07 Jul 2025 02:11:51 +0000 Answer selected: $\frac{1-tan^260^{\circ}}{1+tan^260^{\circ}}+sin^260^{\circ}$ এর মান নির্ণয় কর। https://qnafy.com/14328/%24-frac-1-tan-260-circ-1-tan-260-circ-sin-260-circ-%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=14333#a14333 Trigonometry https://qnafy.com/14328/%24-frac-1-tan-260-circ-1-tan-260-circ-sin-260-circ-%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=14333#a14333 Mon, 07 Jul 2025 02:11:34 +0000 Answer selected: $sec\left(90^{\circ}-\theta\right)=\frac53$ হলে, $cosec\theta-cot\theta$ এর মান নির্ণয় কর। https://qnafy.com/14324/%24sec-left-90-circ-theta-right-frac53%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%24cosec-theta-cot-theta%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=14330#a14330 Trigonometry https://qnafy.com/14324/%24sec-left-90-circ-theta-right-frac53%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%24cosec-theta-cot-theta%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=14330#a14330 Mon, 07 Jul 2025 02:11:15 +0000 Answer selected: $\sqrt2 cos\left(A-B\right)=1$, $2 sin\left(A+B\right)=\sqrt3$ এবং $A$, $B$ সূক্ষকোণ হলে, নিচের প্রশ্নগুলোর উত্তর দাও। https://qnafy.com/14329/%24-sqrt2-cos-left-a-b-right-1%24-%242-sin-left-a-b-right-sqrt3%24-%E0%A6%8F%E0%A6%AC%E0%A6%82-%24a%24-%24b%24-%E0%A6%B8%E0%A7%82%E0%A6%95%E0%A7%8D%E0%A6%B7%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%A8%E0%A6%BF%E0%A6%9A%E0%A7%87%E0%A6%B0-%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%B6%E0%A7%8D%E0%A6%A8%E0%A6%97%E0%A7%81%E0%A6%B2%E0%A7%8B%E0%A6%B0-%E0%A6%89%E0%A6%A4%E0%A7%8D%E0%A6%A4%E0%A6%B0-%E0%A6%A6%E0%A6%BE%E0%A6%93%E0%A5%A4?show=14337#a14337 Trigonometry https://qnafy.com/14329/%24-sqrt2-cos-left-a-b-right-1%24-%242-sin-left-a-b-right-sqrt3%24-%E0%A6%8F%E0%A6%AC%E0%A6%82-%24a%24-%24b%24-%E0%A6%B8%E0%A7%82%E0%A6%95%E0%A7%8D%E0%A6%B7%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%A8%E0%A6%BF%E0%A6%9A%E0%A7%87%E0%A6%B0-%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%B6%E0%A7%8D%E0%A6%A8%E0%A6%97%E0%A7%81%E0%A6%B2%E0%A7%8B%E0%A6%B0-%E0%A6%89%E0%A6%A4%E0%A7%8D%E0%A6%A4%E0%A6%B0-%E0%A6%A6%E0%A6%BE%E0%A6%93%E0%A5%A4?show=14337#a14337 Mon, 07 Jul 2025 02:10:37 +0000 Answer selected: $secA+tanA=\frac{5}{2}$ হলে, $secA-tanA$ এর মান নির্ণয় কর। https://qnafy.com/14278/%24seca-tana-frac-5-2-%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%24seca-tana%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=14321#a14321 Trigonometry https://qnafy.com/14278/%24seca-tana-frac-5-2-%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%24seca-tana%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=14321#a14321 Sat, 28 Jun 2025 02:52:12 +0000 Answer selected: $tanA+sinA=a$ এবং $tanA-sinA=b$ হলে, প্রমাণ কর যে, $a^2-b^2=4\sqrt{ab}$ https://qnafy.com/14275/%24tana-sina-a%24-%E0%A6%8F%E0%A6%AC%E0%A6%82-%24tana-sina-b%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%E0%A6%AF%E0%A7%87-%24a-2-b-2-4-sqrt-ab-%24?show=14315#a14315 Trigonometry https://qnafy.com/14275/%24tana-sina-a%24-%E0%A6%8F%E0%A6%AC%E0%A6%82-%24tana-sina-b%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%E0%A6%AF%E0%A7%87-%24a-2-b-2-4-sqrt-ab-%24?show=14315#a14315 Sat, 28 Jun 2025 02:50:22 +0000 Answer selected: প্রমাণ কর: $\sqrt{\frac{1-sinA}{1+sinA}}$$=secA-tanA$ https://qnafy.com/14274/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%24-sqrt-frac-1-sina-1-sina-%24%24-seca-tana%24?show=14312#a14312 Trigonometry https://qnafy.com/14274/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%24-sqrt-frac-1-sina-1-sina-%24%24-seca-tana%24?show=14312#a14312 Sat, 28 Jun 2025 02:46:22 +0000 Answer selected: প্রমাণ কর: $\frac{tanA}{secA+1}-\frac{secA-1}{tanA}=0$ https://qnafy.com/14273/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%24-frac-tana-seca-1-frac-seca-1-tana-0%24?show=14311#a14311 Trigonometry https://qnafy.com/14273/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%24-frac-tana-seca-1-frac-seca-1-tana-0%24?show=14311#a14311 Sat, 28 Jun 2025 02:45:24 +0000 Answer selected: $cot^4A-cot^2A=1$ হলে, প্রমাণ কর যে, $cos^4A+cos^2A=1$ https://qnafy.com/14276/%24cot-4a-cot-2a-1%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%E0%A6%AF%E0%A7%87-%24cos-4a-cos-2a-1%24?show=14317#a14317 Trigonometry https://qnafy.com/14276/%24cot-4a-cot-2a-1%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%E0%A6%AF%E0%A7%87-%24cos-4a-cos-2a-1%24?show=14317#a14317 Sat, 28 Jun 2025 02:42:24 +0000 Answer selected: $sin^4A+sin^2A=1$ হলে, প্রমাণ কর যে, $tan^4A-tan^2A=1$ https://qnafy.com/14277/%24sin-4a-sin-2a-1%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%E0%A6%AF%E0%A7%87-%24tan-4a-tan-2a-1%24?show=14319#a14319 Trigonometry https://qnafy.com/14277/%24sin-4a-sin-2a-1%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%E0%A6%AF%E0%A7%87-%24tan-4a-tan-2a-1%24?show=14319#a14319 Sat, 28 Jun 2025 02:41:16 +0000 Answer selected: প্রমাণ কর: $\frac{1}{2-sin^2\theta}+\frac{1}{2+tan^2\theta}=1$ https://qnafy.com/14272/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%24-frac-1-2-sin-2-theta-frac-1-2-tan-2-theta-1%24?show=14310#a14310 Trigonometry https://qnafy.com/14272/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%24-frac-1-2-sin-2-theta-frac-1-2-tan-2-theta-1%24?show=14310#a14310 Sat, 28 Jun 2025 02:38:01 +0000 Answer selected: প্রমাণ কর যে, $\frac{1}{1+sin^2\theta}+\frac{1}{1+cosec^2\theta}=1$ https://qnafy.com/14271/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%E0%A6%AF%E0%A7%87-%24-frac-1-1-sin-2-theta-frac-1-1-cosec-2-theta-1%24?show=14309#a14309 Trigonometry https://qnafy.com/14271/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%E0%A6%AF%E0%A7%87-%24-frac-1-1-sin-2-theta-frac-1-1-cosec-2-theta-1%24?show=14309#a14309 Sat, 28 Jun 2025 02:36:29 +0000 Answer selected: প্রমাণ কর যে, $sec^2\theta+cosec^2\theta=$$sec^2\theta \cdot cosec^2\theta$ https://qnafy.com/14270/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%E0%A6%AF%E0%A7%87-%24sec-2-theta-cosec-2-theta-%24%24sec-2-theta-cdot-cosec-2-theta%24?show=14308#a14308 Trigonometry https://qnafy.com/14270/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%E0%A6%AF%E0%A7%87-%24sec-2-theta-cosec-2-theta-%24%24sec-2-theta-cdot-cosec-2-theta%24?show=14308#a14308 Sat, 28 Jun 2025 02:33:14 +0000 Answer selected: প্রমাণ কর যে, $tan\theta + cot \theta= $$sec \theta \cdot cosec \theta$ https://qnafy.com/14269/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%E0%A6%AF%E0%A7%87-%24tan-theta-cot-theta-%24%24sec-theta-cdot-cosec-theta%24?show=14307#a14307 Trigonometry https://qnafy.com/14269/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%E0%A6%AF%E0%A7%87-%24tan-theta-cot-theta-%24%24sec-theta-cdot-cosec-theta%24?show=14307#a14307 Sat, 28 Jun 2025 02:31:49 +0000 Answer selected: $tan(3A)=\sqrt3$ হলে, $A=$ কত? https://qnafy.com/14260/%24tan-3a-sqrt3%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%24a-%24-%E0%A6%95%E0%A6%A4?show=14265#a14265 Trigonometry https://qnafy.com/14260/%24tan-3a-sqrt3%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%24a-%24-%E0%A6%95%E0%A6%A4?show=14265#a14265 Wed, 25 Jun 2025 19:14:15 +0000 Answer selected: $0^\circ \leq\theta\leq90^\circ$ এর জন্য, $sin\theta=$ এর সর্বোচ্চ মান কত? https://qnafy.com/14261/%240-circ-leq-theta-leq90-circ%24-%E0%A6%8F%E0%A6%B0-%E0%A6%9C%E0%A6%A8%E0%A7%8D%E0%A6%AF-%24sin-theta-%24-%E0%A6%8F%E0%A6%B0-%E0%A6%B8%E0%A6%B0%E0%A7%8D%E0%A6%AC%E0%A7%8B%E0%A6%9A%E0%A7%8D%E0%A6%9A-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%95%E0%A6%A4?show=14267#a14267 Trigonometry https://qnafy.com/14261/%240-circ-leq-theta-leq90-circ%24-%E0%A6%8F%E0%A6%B0-%E0%A6%9C%E0%A6%A8%E0%A7%8D%E0%A6%AF-%24sin-theta-%24-%E0%A6%8F%E0%A6%B0-%E0%A6%B8%E0%A6%B0%E0%A7%8D%E0%A6%AC%E0%A7%8B%E0%A6%9A%E0%A7%8D%E0%A6%9A-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%95%E0%A6%A4?show=14267#a14267 Wed, 25 Jun 2025 19:13:53 +0000 Answer selected: $cot(\theta-30^\circ)=\frac{1}{\sqrt3}$ হলে, $sin\theta=$ কত? https://qnafy.com/14259/%24cot-theta-30-circ-frac-1-sqrt3-%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%24sin-theta-%24-%E0%A6%95%E0%A6%A4?show=14263#a14263 Trigonometry https://qnafy.com/14259/%24cot-theta-30-circ-frac-1-sqrt3-%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%24sin-theta-%24-%E0%A6%95%E0%A6%A4?show=14263#a14263 Wed, 25 Jun 2025 19:13:18 +0000 Answer selected: $cos^2\theta-sin^2\theta=\frac{1}{3}$ হলে $cos^4\theta-sin^4\theta$ এর মান কত? https://qnafy.com/14258/%24cos-2-theta-sin-2-theta-frac-1-3-%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%24cos-4-theta-sin-4-theta%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%95%E0%A6%A4?show=14262#a14262 Trigonometry https://qnafy.com/14258/%24cos-2-theta-sin-2-theta-frac-1-3-%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%24cos-4-theta-sin-4-theta%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%95%E0%A6%A4?show=14262#a14262 Wed, 25 Jun 2025 19:12:47 +0000 Answer selected: $ABC$ সমকোণী ত্রিভুজের $\angle B=$ এক সমকোণ এবং $AC = BC$ হলে প্রমাণ কর যে, $\frac{BC cos C - AC cos B}{BC cos B - AC cos A}$$+cosC=0$ https://qnafy.com/14250/%24abc%24-%E0%A6%B8%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3%E0%A7%80-%E0%A6%A4%E0%A7%8D%E0%A6%B0%E0%A6%BF%E0%A6%AD%E0%A7%81%E0%A6%9C%E0%A7%87%E0%A6%B0-%24-angle-b-%24-%E0%A6%8F%E0%A6%95-%E0%A6%B8%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%8F%E0%A6%AC%E0%A6%82-%24ac-bc%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%E0%A6%AF%E0%A7%87-%24-frac-bc-cos-c-ac-cos-b-bc-cos-b-ac-cos-a-%24%24-cosc-0%24?show=14252#a14252 Trigonometry https://qnafy.com/14250/%24abc%24-%E0%A6%B8%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3%E0%A7%80-%E0%A6%A4%E0%A7%8D%E0%A6%B0%E0%A6%BF%E0%A6%AD%E0%A7%81%E0%A6%9C%E0%A7%87%E0%A6%B0-%24-angle-b-%24-%E0%A6%8F%E0%A6%95-%E0%A6%B8%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%8F%E0%A6%AC%E0%A6%82-%24ac-bc%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%E0%A6%AF%E0%A7%87-%24-frac-bc-cos-c-ac-cos-b-bc-cos-b-ac-cos-a-%24%24-cosc-0%24?show=14252#a14252 Tue, 24 Jun 2025 18:42:44 +0000 Answer selected: $ABC$ সমকোণী ত্রিভুজের $\angle B=$ এক সমকোণ এবং $cot A + cot B = 2 cot C$ হলে প্রমাণ কর যে, $AC^2+BC^2=2AB^2$ https://qnafy.com/14251/%24abc%24-%E0%A6%B8%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3%E0%A7%80-%E0%A6%A4%E0%A7%8D%E0%A6%B0%E0%A6%BF%E0%A6%AD%E0%A7%81%E0%A6%9C%E0%A7%87%E0%A6%B0-%24-angle-b-%24-%E0%A6%8F%E0%A6%95-%E0%A6%B8%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%8F%E0%A6%AC%E0%A6%82-%24cot-a-cot-b-2-cot-c%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%E0%A6%AF%E0%A7%87-%24ac-2-bc-2-2ab-2%24?show=14253#a14253 Trigonometry https://qnafy.com/14251/%24abc%24-%E0%A6%B8%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3%E0%A7%80-%E0%A6%A4%E0%A7%8D%E0%A6%B0%E0%A6%BF%E0%A6%AD%E0%A7%81%E0%A6%9C%E0%A7%87%E0%A6%B0-%24-angle-b-%24-%E0%A6%8F%E0%A6%95-%E0%A6%B8%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%8F%E0%A6%AC%E0%A6%82-%24cot-a-cot-b-2-cot-c%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%E0%A6%AF%E0%A7%87-%24ac-2-bc-2-2ab-2%24?show=14253#a14253 Tue, 24 Jun 2025 18:39:59 +0000 Answer selected: $cos\theta=\frac{1}{2}$ হলে $cot\theta$ এর মান কোনটি? https://qnafy.com/14249/%24cos-theta-frac-1-2-%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%24cot-theta%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%95%E0%A7%8B%E0%A6%A8%E0%A6%9F%E0%A6%BF?show=14257#a14257 Trigonometry https://qnafy.com/14249/%24cos-theta-frac-1-2-%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%24cot-theta%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%95%E0%A7%8B%E0%A6%A8%E0%A6%9F%E0%A6%BF?show=14257#a14257 Tue, 24 Jun 2025 18:36:03 +0000 Commented: $sin \theta=p$, $cos \theta=q$, $tan \theta=r$, যেখানে $\theta$ সূক্ষ্মকোণ। তাহলে নিচের প্রশ্নগুলোর উত্তর দাও। https://qnafy.com/14125/%24sin-theta-p%24-%24cos-theta-q%24-%24tan-theta-r%24-%E0%A6%AF%E0%A7%87%E0%A6%96%E0%A6%BE%E0%A6%A8%E0%A7%87-%24-theta%24-%E0%A6%B8%E0%A7%82%E0%A6%95%E0%A7%8D%E0%A6%B7%E0%A7%8D%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3%E0%A5%A4-%E0%A6%A4%E0%A6%BE%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%A8%E0%A6%BF%E0%A6%9A%E0%A7%87%E0%A6%B0-%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%B6%E0%A7%8D%E0%A6%A8%E0%A6%97%E0%A7%81%E0%A6%B2%E0%A7%8B%E0%A6%B0-%E0%A6%89%E0%A6%A4%E0%A7%8D%E0%A6%A4%E0%A6%B0-%E0%A6%A6%E0%A6%BE%E0%A6%93%E0%A5%A4?show=14256#c14256 Trigonometry https://qnafy.com/14125/%24sin-theta-p%24-%24cos-theta-q%24-%24tan-theta-r%24-%E0%A6%AF%E0%A7%87%E0%A6%96%E0%A6%BE%E0%A6%A8%E0%A7%87-%24-theta%24-%E0%A6%B8%E0%A7%82%E0%A6%95%E0%A7%8D%E0%A6%B7%E0%A7%8D%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3%E0%A5%A4-%E0%A6%A4%E0%A6%BE%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%A8%E0%A6%BF%E0%A6%9A%E0%A7%87%E0%A6%B0-%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%B6%E0%A7%8D%E0%A6%A8%E0%A6%97%E0%A7%81%E0%A6%B2%E0%A7%8B%E0%A6%B0-%E0%A6%89%E0%A6%A4%E0%A7%8D%E0%A6%A4%E0%A6%B0-%E0%A6%A6%E0%A6%BE%E0%A6%93%E0%A5%A4?show=14256#c14256 Tue, 24 Jun 2025 15:41:12 +0000 Answer selected: মান নির্ণয় কর: $3cot^260^\circ+\frac14cosec^230^\circ+$$5sin^245^\circ-4cos^260^\circ$ https://qnafy.com/14102/%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0-%243cot-260-circ-frac14cosec-230-circ-%24%245sin-245-circ-4cos-260-circ%24?show=14122#a14122 Trigonometry https://qnafy.com/14102/%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0-%243cot-260-circ-frac14cosec-230-circ-%24%245sin-245-circ-4cos-260-circ%24?show=14122#a14122 Fri, 20 Jun 2025 17:06:14 +0000 Answer selected: $\triangle ABC$ এর $\angle B = 90^\circ$, $AB=5$ সে.মি., $BC=12$ সে.মি. হলে, নিচের প্রশ্নগুলোর উত্তর দাও। https://qnafy.com/14123/%24-triangle-abc%24-%E0%A6%8F%E0%A6%B0-%24-angle-b-90-circ%24-%24ab-5%24-%E0%A6%B8%E0%A7%87-%E0%A6%AE%E0%A6%BF-%24bc-12%24-%E0%A6%B8%E0%A7%87-%E0%A6%AE%E0%A6%BF-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%A8%E0%A6%BF%E0%A6%9A%E0%A7%87%E0%A6%B0-%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%B6%E0%A7%8D%E0%A6%A8%E0%A6%97%E0%A7%81%E0%A6%B2%E0%A7%8B%E0%A6%B0-%E0%A6%89%E0%A6%A4%E0%A7%8D%E0%A6%A4%E0%A6%B0-%E0%A6%A6%E0%A6%BE%E0%A6%93%E0%A5%A4?show=14124#a14124 Trigonometry https://qnafy.com/14123/%24-triangle-abc%24-%E0%A6%8F%E0%A6%B0-%24-angle-b-90-circ%24-%24ab-5%24-%E0%A6%B8%E0%A7%87-%E0%A6%AE%E0%A6%BF-%24bc-12%24-%E0%A6%B8%E0%A7%87-%E0%A6%AE%E0%A6%BF-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%A8%E0%A6%BF%E0%A6%9A%E0%A7%87%E0%A6%B0-%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%B6%E0%A7%8D%E0%A6%A8%E0%A6%97%E0%A7%81%E0%A6%B2%E0%A7%8B%E0%A6%B0-%E0%A6%89%E0%A6%A4%E0%A7%8D%E0%A6%A4%E0%A6%B0-%E0%A6%A6%E0%A6%BE%E0%A6%93%E0%A5%A4?show=14124#a14124 Fri, 20 Jun 2025 17:04:13 +0000 Answered: সমাধান কর: $tan^2\theta-\left(1+\sqrt3\right)tan \theta$$+\sqrt3=0$ https://qnafy.com/14101/%E0%A6%B8%E0%A6%AE%E0%A6%BE%E0%A6%A7%E0%A6%BE%E0%A6%A8-%E0%A6%95%E0%A6%B0-%24tan-2-theta-left-1-sqrt3-right-tan-theta%24%24-sqrt3-0%24?show=14121#a14121 Trigonometry https://qnafy.com/14101/%E0%A6%B8%E0%A6%AE%E0%A6%BE%E0%A6%A7%E0%A6%BE%E0%A6%A8-%E0%A6%95%E0%A6%B0-%24tan-2-theta-left-1-sqrt3-right-tan-theta%24%24-sqrt3-0%24?show=14121#a14121 Fri, 20 Jun 2025 11:26:47 +0000 Answered: সমাধান কর: $2sin^2\theta+3cos \theta-3=0$, $\theta$ সূক্ষ্মকোণ। https://qnafy.com/14100/%E0%A6%B8%E0%A6%AE%E0%A6%BE%E0%A6%A7%E0%A6%BE%E0%A6%A8-%E0%A6%95%E0%A6%B0-%242sin-2-theta-3cos-theta-3-0%24-%24-theta%24-%E0%A6%B8%E0%A7%82%E0%A6%95%E0%A7%8D%E0%A6%B7%E0%A7%8D%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3%E0%A5%A4?show=14120#a14120 Trigonometry https://qnafy.com/14100/%E0%A6%B8%E0%A6%AE%E0%A6%BE%E0%A6%A7%E0%A6%BE%E0%A6%A8-%E0%A6%95%E0%A6%B0-%242sin-2-theta-3cos-theta-3-0%24-%24-theta%24-%E0%A6%B8%E0%A7%82%E0%A6%95%E0%A7%8D%E0%A6%B7%E0%A7%8D%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3%E0%A5%A4?show=14120#a14120 Fri, 20 Jun 2025 04:58:08 +0000 Answered: সমাধান কর: $cos^2\theta-sin^2\theta=2-5cos\theta$ যখন $\theta$ সূক্ষ্মকোণ। https://qnafy.com/14099/%E0%A6%B8%E0%A6%AE%E0%A6%BE%E0%A6%A7%E0%A6%BE%E0%A6%A8-%E0%A6%95%E0%A6%B0-%24cos-2-theta-sin-2-theta-2-5cos-theta%24-%E0%A6%AF%E0%A6%96%E0%A6%A8-%24-theta%24-%E0%A6%B8%E0%A7%82%E0%A6%95%E0%A7%8D%E0%A6%B7%E0%A7%8D%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3%E0%A5%A4?show=14119#a14119 Trigonometry https://qnafy.com/14099/%E0%A6%B8%E0%A6%AE%E0%A6%BE%E0%A6%A7%E0%A6%BE%E0%A6%A8-%E0%A6%95%E0%A6%B0-%24cos-2-theta-sin-2-theta-2-5cos-theta%24-%E0%A6%AF%E0%A6%96%E0%A6%A8-%24-theta%24-%E0%A6%B8%E0%A7%82%E0%A6%95%E0%A7%8D%E0%A6%B7%E0%A7%8D%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3%E0%A5%A4?show=14119#a14119 Fri, 20 Jun 2025 04:21:32 +0000 Answered: সমাধান কর: $sin \theta + cos \theta =1$, যখন $0^\circ \leq \theta \leq 90^\circ$ https://qnafy.com/14098/%E0%A6%B8%E0%A6%AE%E0%A6%BE%E0%A6%A7%E0%A6%BE%E0%A6%A8-%E0%A6%95%E0%A6%B0-%24sin-theta-cos-theta-1%24-%E0%A6%AF%E0%A6%96%E0%A6%A8-%240-circ-leq-theta-leq-90-circ%24?show=14118#a14118 Trigonometry https://qnafy.com/14098/%E0%A6%B8%E0%A6%AE%E0%A6%BE%E0%A6%A7%E0%A6%BE%E0%A6%A8-%E0%A6%95%E0%A6%B0-%24sin-theta-cos-theta-1%24-%E0%A6%AF%E0%A6%96%E0%A6%A8-%240-circ-leq-theta-leq-90-circ%24?show=14118#a14118 Fri, 20 Jun 2025 04:07:58 +0000 Answered: দেখাও যে, $cos3A=4cos^3A-3cosA$ যদি $A=30^\circ$ হয়। https://qnafy.com/14097/%E0%A6%A6%E0%A7%87%E0%A6%96%E0%A6%BE%E0%A6%93-%E0%A6%AF%E0%A7%87-%24cos3a-4cos-3a-3cosa%24-%E0%A6%AF%E0%A6%A6%E0%A6%BF-%24a-30-circ%24-%E0%A6%B9%E0%A7%9F%E0%A5%A4?show=14114#a14114 Trigonometry https://qnafy.com/14097/%E0%A6%A6%E0%A7%87%E0%A6%96%E0%A6%BE%E0%A6%93-%E0%A6%AF%E0%A7%87-%24cos3a-4cos-3a-3cosa%24-%E0%A6%AF%E0%A6%A6%E0%A6%BF-%24a-30-circ%24-%E0%A6%B9%E0%A7%9F%E0%A5%A4?show=14114#a14114 Thu, 19 Jun 2025 18:33:43 +0000 Answered: $A$ ও $B$ সূক্ষ্মকোণ এবং $cot(A+B)=1$, $cot(A-B)=\sqrt3$ হলে, $A$ ও $B$ এর মান নির্ণয় কর। https://qnafy.com/14096/%24a%24-%E0%A6%93-%24b%24-%E0%A6%B8%E0%A7%82%E0%A6%95%E0%A7%8D%E0%A6%B7%E0%A7%8D%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%8F%E0%A6%AC%E0%A6%82-%24cot-a-b-1%24-%24cot-a-b-sqrt3%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%24a%24-%E0%A6%93-%24b%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=14113#a14113 Trigonometry https://qnafy.com/14096/%24a%24-%E0%A6%93-%24b%24-%E0%A6%B8%E0%A7%82%E0%A6%95%E0%A7%8D%E0%A6%B7%E0%A7%8D%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%8F%E0%A6%AC%E0%A6%82-%24cot-a-b-1%24-%24cot-a-b-sqrt3%24-%E0%A6%B9%E0%A6%B2%E0%A7%87-%24a%24-%E0%A6%93-%24b%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=14113#a14113 Thu, 19 Jun 2025 18:08:39 +0000 Commented: সমাধান কর: $\frac{cosA-sinA}{cosA+sinA}=\frac{\sqrt3-1}{\sqrt3+1}$ https://qnafy.com/14095/%E0%A6%B8%E0%A6%AE%E0%A6%BE%E0%A6%A7%E0%A6%BE%E0%A6%A8-%E0%A6%95%E0%A6%B0-%24-frac-cosa-sina-cosa-sina-frac-sqrt3-1-sqrt3-1-%24?show=14112#c14112 Trigonometry https://qnafy.com/14095/%E0%A6%B8%E0%A6%AE%E0%A6%BE%E0%A6%A7%E0%A6%BE%E0%A6%A8-%E0%A6%95%E0%A6%B0-%24-frac-cosa-sina-cosa-sina-frac-sqrt3-1-sqrt3-1-%24?show=14112#c14112 Thu, 19 Jun 2025 17:07:07 +0000 Answered: $cos(A-B)=1$, $2sin(A+B)=\sqrt3$ এবং $A$, $B$ সূক্ষ্মকোণ হলে, $A$ এবং $B$ এর মান নির্ণয় কর। https://qnafy.com/14094/%24cos-a-b-1%24-%242sin-a-b-sqrt3%24-%E0%A6%8F%E0%A6%AC%E0%A6%82-%24a%24-%24b%24-%E0%A6%B8%E0%A7%82%E0%A6%95%E0%A7%8D%E0%A6%B7%E0%A7%8D%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%B9%E0%A6%B2%E0%A7%87-%24a%24-%E0%A6%8F%E0%A6%AC%E0%A6%82-%24b%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=14110#a14110 Trigonometry https://qnafy.com/14094/%24cos-a-b-1%24-%242sin-a-b-sqrt3%24-%E0%A6%8F%E0%A6%AC%E0%A6%82-%24a%24-%24b%24-%E0%A6%B8%E0%A7%82%E0%A6%95%E0%A7%8D%E0%A6%B7%E0%A7%8D%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%B9%E0%A6%B2%E0%A7%87-%24a%24-%E0%A6%8F%E0%A6%AC%E0%A6%82-%24b%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4?show=14110#a14110 Thu, 19 Jun 2025 16:53:47 +0000 Answered: $2cos(A+B)=1=2sin(A-B)$ এবং $A$, $B$ সূক্ষ্মকোণ হলে দেখাও যে, $A=45^\circ$, $B=15^\circ$ https://qnafy.com/14093/%242cos-a-b-1-2sin-a-b-%24-%E0%A6%8F%E0%A6%AC%E0%A6%82-%24a%24-%24b%24-%E0%A6%B8%E0%A7%82%E0%A6%95%E0%A7%8D%E0%A6%B7%E0%A7%8D%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%A6%E0%A7%87%E0%A6%96%E0%A6%BE%E0%A6%93-%E0%A6%AF%E0%A7%87-%24a-45-circ%24-%24b-15-circ%24?show=14109#a14109 Trigonometry https://qnafy.com/14093/%242cos-a-b-1-2sin-a-b-%24-%E0%A6%8F%E0%A6%AC%E0%A6%82-%24a%24-%24b%24-%E0%A6%B8%E0%A7%82%E0%A6%95%E0%A7%8D%E0%A6%B7%E0%A7%8D%E0%A6%AE%E0%A6%95%E0%A7%8B%E0%A6%A3-%E0%A6%B9%E0%A6%B2%E0%A7%87-%E0%A6%A6%E0%A7%87%E0%A6%96%E0%A6%BE%E0%A6%93-%E0%A6%AF%E0%A7%87-%24a-45-circ%24-%24b-15-circ%24?show=14109#a14109 Thu, 19 Jun 2025 16:43:24 +0000 Answered: দেখাও যে, $tan2A = \frac{2tanA}{1-tan^2A}$ যদি $A=30^\circ$ হয়। https://qnafy.com/14092/%E0%A6%A6%E0%A7%87%E0%A6%96%E0%A6%BE%E0%A6%93-%E0%A6%AF%E0%A7%87-%24tan2a-frac-2tana-1-tan-2a-%24-%E0%A6%AF%E0%A6%A6%E0%A6%BF-%24a-30-circ%24-%E0%A6%B9%E0%A7%9F%E0%A5%A4?show=14108#a14108 Trigonometry https://qnafy.com/14092/%E0%A6%A6%E0%A7%87%E0%A6%96%E0%A6%BE%E0%A6%93-%E0%A6%AF%E0%A7%87-%24tan2a-frac-2tana-1-tan-2a-%24-%E0%A6%AF%E0%A6%A6%E0%A6%BF-%24a-30-circ%24-%E0%A6%B9%E0%A7%9F%E0%A5%A4?show=14108#a14108 Thu, 19 Jun 2025 16:30:11 +0000 Answered: দেখাও যে, $sin2A = \frac{2tanA}{1+tan^2A}$ যদি $A=45^\circ$ হয়। https://qnafy.com/14091/%E0%A6%A6%E0%A7%87%E0%A6%96%E0%A6%BE%E0%A6%93-%E0%A6%AF%E0%A7%87-%24sin2a-frac-2tana-1-tan-2a-%24-%E0%A6%AF%E0%A6%A6%E0%A6%BF-%24a-45-circ%24-%E0%A6%B9%E0%A7%9F%E0%A5%A4?show=14107#a14107 Trigonometry https://qnafy.com/14091/%E0%A6%A6%E0%A7%87%E0%A6%96%E0%A6%BE%E0%A6%93-%E0%A6%AF%E0%A7%87-%24sin2a-frac-2tana-1-tan-2a-%24-%E0%A6%AF%E0%A6%A6%E0%A6%BF-%24a-45-circ%24-%E0%A6%B9%E0%A7%9F%E0%A5%A4?show=14107#a14107 Thu, 19 Jun 2025 16:21:52 +0000