QnA fy - Recent questions tagged ত্রিকোণমিতি

QnA fy - Recent questions tagged ত্রিকোণমিতি https://qnafy.com/tag/%E0%A6%A4%E0%A7%8D%E0%A6%B0%E0%A6%BF%E0%A6%95%E0%A7%8B%E0%A6%A3%E0%A6%AE%E0%A6%BF%E0%A6%A4%E0%A6%BF Powered by Question2Answer 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 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 Wed, 03 Sep 2025 16:50:52 +0000 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 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 Wed, 03 Sep 2025 16:50:39 +0000 $18$ 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 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 Wed, 03 Sep 2025 16:50:16 +0000 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 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 Wed, 03 Sep 2025 16:49:53 +0000 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 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 Wed, 03 Sep 2025 16:49:25 +0000 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 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 Wed, 03 Sep 2025 16:49:09 +0000 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 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 Wed, 03 Sep 2025 16:48:18 +0000 $64$ 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 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 Wed, 03 Sep 2025 16:47:58 +0000 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 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 Wed, 03 Sep 2025 16:47:30 +0000 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 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 Sat, 30 Aug 2025 16:05:42 +0000 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 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 Sat, 30 Aug 2025 16:01:51 +0000 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 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 Sat, 30 Aug 2025 16:00:29 +0000 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 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 Thu, 24 Jul 2025 11:21:06 +0000 একটি সমবাহু ক্রিভুজের প্রত্যেকটি বাহুর দৈর্ঘ্য $2$ সে.মি. এবং উচ্চতা $x$ সে.মি. হলে, $x$ এর মান কোনটি? https://qnafy.com/14722/%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%B8%E0%A6%AE%E0%A6%AC%E0%A6%BE%E0%A6%B9%E0%A7%81-%E0%A6%95%E0%A7%8D%E0%A6%B0%E0%A6%BF%E0%A6%AD%E0%A7%81%E0%A6%9C%E0%A7%87%E0%A6%B0-%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%A4%E0%A7%8D%E0%A6%AF%E0%A7%87%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%AC%E0%A6%BE%E0%A6%B9%E0%A7%81%E0%A6%B0-%E0%A6%A6%E0%A7%88%E0%A6%B0%E0%A7%8D%E0%A6%98%E0%A7%8D%E0%A6%AF-%242%24-%E0%A6%B8%E0%A7%87-%E0%A6%AE%E0%A6%BF-%E0%A6%8F%E0%A6%AC%E0%A6%82-%E0%A6%89%E0%A6%9A%E0%A7%8D%E0%A6%9A%E0%A6%A4%E0%A6%BE-%24x%24-%E0%A6%B8%E0%A7%87-%E0%A6%AE%E0%A6%BF-%E0%A6%B9%E0%A6%B2%E0%A7%87-%24x%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 Geometry https://qnafy.com/14722/%E0%A6%8F%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%B8%E0%A6%AE%E0%A6%AC%E0%A6%BE%E0%A6%B9%E0%A7%81-%E0%A6%95%E0%A7%8D%E0%A6%B0%E0%A6%BF%E0%A6%AD%E0%A7%81%E0%A6%9C%E0%A7%87%E0%A6%B0-%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%A4%E0%A7%8D%E0%A6%AF%E0%A7%87%E0%A6%95%E0%A6%9F%E0%A6%BF-%E0%A6%AC%E0%A6%BE%E0%A6%B9%E0%A7%81%E0%A6%B0-%E0%A6%A6%E0%A7%88%E0%A6%B0%E0%A7%8D%E0%A6%98%E0%A7%8D%E0%A6%AF-%242%24-%E0%A6%B8%E0%A7%87-%E0%A6%AE%E0%A6%BF-%E0%A6%8F%E0%A6%AC%E0%A6%82-%E0%A6%89%E0%A6%9A%E0%A7%8D%E0%A6%9A%E0%A6%A4%E0%A6%BE-%24x%24-%E0%A6%B8%E0%A7%87-%E0%A6%AE%E0%A6%BF-%E0%A6%B9%E0%A6%B2%E0%A7%87-%24x%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 Mon, 14 Jul 2025 16:37:09 +0000 $\sqrt2 cos\left(A-B\right)=1$, $2 sin\left(A+B\right)=\sqrt3$ 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 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 Mon, 30 Jun 2025 06:31:11 +0000 $\frac{1-tan^260^{\circ}}{1+tan^260^{\circ}}+sin^260^{\circ}$ 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 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 Mon, 30 Jun 2025 06:19:07 +0000 $sin60^{\circ}\cdot cos30^{\circ}$$ + sec60^{\circ}\cdot sin30^{\circ}$ এর মান নির্ণয় কর। https://qnafy.com/14327/%24sin60-circ-cdot-cos30-circ-%24%24-sec60-circ-cdot-sin30-circ-%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4 Trigonometry https://qnafy.com/14327/%24sin60-circ-cdot-cos30-circ-%24%24-sec60-circ-cdot-sin30-circ-%24-%E0%A6%8F%E0%A6%B0-%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0%E0%A5%A4 Mon, 30 Jun 2025 06:17:21 +0000 $cot90^{\circ}\cdot tan0^{\circ}\cdot $$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 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 Mon, 30 Jun 2025 06:04:56 +0000 $\frac{1-sin^245^{\circ}}{1+sin^245^{\circ}}+tan^245^{\circ}$ 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 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 Mon, 30 Jun 2025 06:00:34 +0000 $sec\left(90^{\circ}-\theta\right)=\frac53$ 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 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 Mon, 30 Jun 2025 05:51:07 +0000 $secA+tanA=\frac{5}{2}$ 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 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 Thu, 26 Jun 2025 06:43:38 +0000 $sin^4A+sin^2A=1$ 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 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 Thu, 26 Jun 2025 06:40:52 +0000 $cot^4A-cot^2A=1$ 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 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 Thu, 26 Jun 2025 06:38:58 +0000 $tanA+sinA=a$ 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 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 Thu, 26 Jun 2025 06:35:21 +0000 প্রমাণ কর: $\sqrt{\frac{1-sinA}{1+sinA}}$$=secA-tanA$ https://qnafy.com/14274/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%24-sqrt-frac-1-sina-1-sina-%24%24-seca-tana%24 Trigonometry https://qnafy.com/14274/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%24-sqrt-frac-1-sina-1-sina-%24%24-seca-tana%24 Thu, 26 Jun 2025 06:24:52 +0000 প্রমাণ কর: $\frac{tanA}{secA+1}-\frac{secA-1}{tanA}=0$ https://qnafy.com/14273/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%24-frac-tana-seca-1-frac-seca-1-tana-0%24 Trigonometry https://qnafy.com/14273/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%24-frac-tana-seca-1-frac-seca-1-tana-0%24 Thu, 26 Jun 2025 06:21:32 +0000 প্রমাণ কর: $\frac{1}{2-sin^2\theta}+\frac{1}{2+tan^2\theta}=1$ https://qnafy.com/14272/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%24-frac-1-2-sin-2-theta-frac-1-2-tan-2-theta-1%24 Trigonometry https://qnafy.com/14272/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%24-frac-1-2-sin-2-theta-frac-1-2-tan-2-theta-1%24 Thu, 26 Jun 2025 06:19:37 +0000 প্রমাণ কর যে, $\frac{1}{1+sin^2\theta}+\frac{1}{1+cosec^2\theta}=1$ https://qnafy.com/14271/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%E0%A6%AF%E0%A7%87-%24-frac-1-1-sin-2-theta-frac-1-1-cosec-2-theta-1%24 Trigonometry https://qnafy.com/14271/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%AE%E0%A6%BE%E0%A6%A3-%E0%A6%95%E0%A6%B0-%E0%A6%AF%E0%A7%87-%24-frac-1-1-sin-2-theta-frac-1-1-cosec-2-theta-1%24 Thu, 26 Jun 2025 06:08:08 +0000 প্রমাণ কর যে, $sec^2\theta+cosec^2\theta=$$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 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 Thu, 26 Jun 2025 05:59:20 +0000 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 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 Thu, 26 Jun 2025 05:18:09 +0000 $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 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 Tue, 24 Jun 2025 18:03:47 +0000 $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 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 Tue, 24 Jun 2025 18:02:55 +0000 $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 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 Tue, 24 Jun 2025 18:02:08 +0000 $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 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 Tue, 24 Jun 2025 17:57:30 +0000 $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 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 Mon, 23 Jun 2025 15:38:10 +0000 $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 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 Mon, 23 Jun 2025 15:36:34 +0000 $cos\theta=\frac{1}{2}$ 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 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 Mon, 23 Jun 2025 15:34:38 +0000 $sin \theta=p$, $cos \theta=q$, $tan \theta=r$, 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 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 Fri, 20 Jun 2025 12:38:30 +0000 $\triangle ABC$ 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 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 Fri, 20 Jun 2025 11:42:25 +0000 মান নির্ণয় কর: $3cot^260^\circ+\frac14cosec^230^\circ+$$5sin^245^\circ-4cos^260^\circ$ https://qnafy.com/14102/%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0-%243cot-260-circ-frac14cosec-230-circ-%24%245sin-245-circ-4cos-260-circ%24 Trigonometry https://qnafy.com/14102/%E0%A6%AE%E0%A6%BE%E0%A6%A8-%E0%A6%A8%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%A3%E0%A7%9F-%E0%A6%95%E0%A6%B0-%243cot-260-circ-frac14cosec-230-circ-%24%245sin-245-circ-4cos-260-circ%24 Thu, 19 Jun 2025 15:43:38 +0000 সমাধান কর: $tan^2\theta-\left(1+\sqrt3\right)tan \theta$$+\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 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 Thu, 19 Jun 2025 15:43:11 +0000 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 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 Thu, 19 Jun 2025 15:42:52 +0000 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 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 Thu, 19 Jun 2025 15:42:08 +0000 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 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 Thu, 19 Jun 2025 15:41:43 +0000 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 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 Thu, 19 Jun 2025 15:40:58 +0000 $A$ 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 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 Thu, 19 Jun 2025 15:40:13 +0000 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 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 Thu, 19 Jun 2025 15:35:35 +0000 $cos(A-B)=1$, $2sin(A+B)=\sqrt3$ 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 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 Thu, 19 Jun 2025 15:35:09 +0000 $2cos(A+B)=1=2sin(A-B)$ 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 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 Thu, 19 Jun 2025 15:34:49 +0000 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 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 Thu, 19 Jun 2025 15:34:26 +0000