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$0^\circ \leq\theta\leq90^\circ$ এর জন্য, $sin\theta=$ এর সর্বোচ্চ মান কত?

  • (ক) $-1$
  • (খ) $0$
  • (গ) $\frac{1}{2}$
  • (ঘ) $1$

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দেওয়া আছে,
$0^\circ \leq\theta\leq90^\circ$

অর্থাৎ সর্বোচ্চ মান নির্ণয়ের জন্য $\theta$ কোণের পরিমাণ সর্বোচ্চ ডিগ্রি নিতে হবে।
অর্থাৎ $0^\circ$ থেকে $90^\circ$ সর্বোচ্চ $\theta=90^\circ$ ধরতে হবে।

সুতরাং
$sin\theta=sin90^\circ$

$\therefore sin\theta=1$

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