જો $\theta$ કોઈ ખૂણો હોય,તો $\sin^2 \theta \cos^2 \theta =$

  • A
    $1 - \cos 2\theta$
  • B
    $1 - \cos 4\theta$
  • C
    $\frac{1}{4}(1 - \cos 4\theta)$
  • D
    $\frac{1}{8}(1 - \cos 4\theta)$

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જો $\sin \alpha = \frac{-3}{5}$ જ્યાં $\pi < \alpha < \frac{3\pi}{2}$ હોય,તો $\cos \frac{\alpha}{2} = $

સાબિત કરો કે $\tan 4x = \frac{4 \tan x (1 - \tan^2 x)}{1 - 6 \tan^2 x + \tan^4 x}$.

$\cot 7\frac{1}{2}^{\circ} + \tan 67\frac{1}{2}^{\circ} - \cot 67\frac{1}{2}^{\circ} - \tan 7\frac{1}{2}^{\circ}$ ની કિંમત છે:

$\operatorname{cosec} 2 \theta - \cot 2 \theta = ?$

$2\cos x - \cos 3x - \cos 5x = $

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