કેટલાક $a, b, c \in R$ માટે,જો $\sin 5 \theta = a \cos^4 \theta \sin \theta + b \cos^2 \theta \sin^3 \theta + c \sin^5 \theta$ હોય,તો $abc =$

  • A
    -$10$
  • B
    $10$
  • C
    $0$
  • D
    -$50$

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$\sqrt{2 + \sqrt{2 + 2\cos 4\theta}} = $

જો $\cos \frac{\pi}{4} \cos \frac{\pi}{8} \cos \frac{\pi}{16} \cos \frac{\pi}{32} = 2^m \operatorname{cosec} \frac{\pi}{n}$ હોય,તો $m+n=$

$\cos A \cos 2 A \cos 4 A \ldots \cos 2^{n-1} A$ ની કિંમત શું થાય?

કિંમત શોધો: $\csc A - 2 \cot 2A \cos A$

$\frac{\cot ^2 15^{\circ}-1}{\cot ^2 15^{\circ}+1} = $

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