જો $\tan A = \tan \alpha \coth x = \cot \beta \tanh x$ હોય,તો $\tan (\alpha + \beta) =$

  • A
    $\cosh 2x \operatorname{cosec} 2A$
  • B
    $\sinh 2x \cos 2A$
  • C
    $\cosh 2x \sec 2A$
  • D
    $\sinh 2x \operatorname{cosec} 2A$

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ધારો કે $P = \{ \theta : \sin \theta - \cos \theta = \sqrt{2} \cos \theta \}$ અને $Q = \{ \theta : \sin \theta + \cos \theta = \sqrt{2} \sin \theta \}$ બે ગણ છે. તો

જો $\sin A + \sin B = x$ અને $\cos A + \cos B = y$ હોય,તો $\sin(A + B) = $

જો $\theta$ ત્રીજા ચરણમાં હોય,તો $\sqrt{4 \sin ^4 \theta+\sin ^2 2 \theta}+4 \cos ^2\left(\frac{\pi}{4}-\frac{\theta}{2}\right)=$

જો $x = \log \left[ \cot \left( \frac{\pi}{4} + \theta \right) \right]$ હોય, તો $\sinh x$ ની કિંમત શું થાય?

$\sin 5^{\circ} + \sin 10^{\circ} + \sin 15^{\circ} + \dots + \sin 350^{\circ} + \sin 355^{\circ}$ ની કિંમત શોધો.

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