જો $\cosh \alpha + \sinh \alpha = e^3$ અને $\sinh x = \frac{\alpha}{\alpha+1}$ હોય,તો $\tanh x =$

  • A
    $\frac{\alpha}{\alpha+2}$
  • B
    $\frac{\alpha}{\alpha-3}$
  • C
    $\frac{\alpha}{\alpha+4}$
  • D
    $\frac{2 \alpha}{\alpha-1}$

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કિંમત શોધો: $\sin ^2 18^{\circ}+\sin ^2 24^{\circ}+\sin ^2 36^{\circ}+\sin ^2 42^{\circ}+\sin ^2 78^{\circ}+\sin ^2 90^{\circ}+\sin ^2 96^{\circ}+\sin ^2 102^{\circ}+\sin ^2 138^{\circ}+\sin ^2 162^{\circ}$

$\tan 6^{\circ} \tan 42^{\circ} \tan 66^{\circ} \tan 78^{\circ} = $

$\tan 2 \alpha \cdot \tan \left(30^{\circ}-\alpha\right)+\tan 2 \alpha \cdot \tan \left(60^{\circ}-\alpha\right)+\tan \left(60^{\circ}-\alpha\right) \cdot \tan \left(30^{\circ}-\alpha\right)$ ની કિંમત શું થાય?

જો $\sin \theta + \cos \theta = p$ અને $\sin^3 \theta + \cos^3 \theta = q$ હોય,તો $p(p^2 - 3)$ ની કિંમત શોધો.

જો $\sin x + \sin^2 x = 1$ હોય,તો $\cos^{12} x + 3\cos^{10} x + 3\cos^8 x + \cos^6 x - 2$ ની કિંમત કેટલી થાય?

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