જો $a \tan \theta = b$ હોય,તો $a \cos 2\theta + b \sin 2\theta = $

  • A
    $a$
  • B
    $b$
  • C
    $-a$
  • D
    $-b$

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Similar Questions

$\tan A + 2 \tan 2A + 4 \tan 4A + 8 \cot 8A = $

જો $\tan \left(\frac{x}{2}\right) = \frac{m}{n}$ હોય,તો $m \sin (x) + n \cos (x)$ ની કિંમત કેટલી થાય?

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

$\frac{1 + \sin A - \cos A}{1 + \sin A + \cos A} = $

જો $90^\circ < A < 180^\circ$ અને $\sin A = \frac{4}{5}$ હોય,તો $\tan \frac{A}{2}$ ની કિંમત શોધો.

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