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 $m+n=$

  • A
    $27$
  • B
    $25$
  • C
    $28$
  • D
    $29$

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સાબિત કરો કે $\sin 2x + 2 \sin 4x + \sin 6x = 4 \cos^2 x \sin 4x$.

$\frac{\sin \theta + \sin 2\theta}{1 + \cos \theta + \cos 2\theta} = $

જો $\sec x + \tan x = 2$,જ્યાં $0 < x < \frac{\pi}{2}$ હોય,તો $\sin \frac{x}{4}$ ની કિંમત શોધો.

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

જો $\frac{\sec 8\theta - 1}{\sec 4\theta - 1} = \frac{a + b \tan^2 2\theta}{1 + c \tan^2 2\theta + d \tan^4 2\theta}$ (જ્યાં $\theta \neq \frac{n\pi}{16}, n \in I$),તો $(a - b + c - d)$ ની કિંમત શોધો.

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