જો $\cos 3\theta = \alpha \cos \theta + \beta \cos^3 \theta$ હોય,તો $(\alpha, \beta) = $

  • A
    $(3, 4)$
  • B
    $(4, 3)$
  • C
    $(-3, 4)$
  • D
    $(3, -4)$

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$\frac{\sec 8A - 1}{\sec 4A - 1} = $

જો $\cos A = \frac{3}{4}$ હોય,તો $32\sin \left( \frac{A}{2} \right)\sin \left( \frac{5A}{2} \right) = $

$\cos x \cdot \cos 7 x - \cos 5 x \cdot \cos 13 x = $

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.

સાબિત કરો કે $\tan 3x \tan 2x \tan x = \tan 3x - \tan 2x - \tan x$.

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