જો $\tan \alpha = \frac{1}{7}$ અને $\tan \beta = \frac{1}{3}$ હોય,તો $\cos 2\alpha = $

  • A
    $\sin 2\beta$
  • B
    $\sin 4\beta$
  • C
    $\sin 3\beta$
  • D
    આમાંથી કોઈ નહીં

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Similar Questions

જો $\frac{\tan 3A}{\tan A} = a$ હોય,તો $\frac{\sin 3A}{\sin A}$ ની કિંમત શોધો.

જો $\tan \frac{A}{2} = \frac{3}{2}$ હોય,તો $\frac{1 + \cos A}{1 - \cos A} = $

જો $\tan A = \frac{1}{2}$ હોય,તો $\tan 3A = $

જો $\tan x + \tan \left(x + \frac{\pi}{3}\right) + \tan \left(x + \frac{2\pi}{3}\right) = 3$ હોય,તો $\tan 3x$ ની કિંમત કેટલી થાય?

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

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