જો $\sin \theta = \frac{3}{5}$ અને $\theta$ પ્રથમ ચરણમાં નથી,તો $15 \sin 2 \theta - 20 \cos 2 \theta - 7 \tan 2 \theta = $

  • A
    -$4$
  • B
    -$12$
  • C
    $12$
  • D
    $4$

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

સાબિત કરો કે $\frac{\sin x - \sin 3x}{\sin^2 x - \cos^2 x} = 2 \sin x$.

$\frac{\cot ^2 15^{\circ}-1}{\cot ^2 15^{\circ}+1} = $

જો $\sin \theta = -\frac{3}{4}$ હોય,તો $\sin 2 \theta = $

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?

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