यदि $x = \log_e \left[ \cot \left( \frac{\pi}{4} + \theta \right) \right]$ जहाँ $|\theta| < \frac{\pi}{4}$ है,तो $\sinh x =$

  • A
    $-\sin 2\theta$
  • B
    $\sin 2\theta$
  • C
    $\tan 2\theta$
  • D
    $-\tan 2\theta$

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यदि $\sin \theta = -\frac{3}{4}$ है,तो $\sin 2 \theta = $

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$\frac{2}{\sqrt{2+\sqrt{2+\sqrt{2+2 \cos 4x}}}}$ का सरलतम रूप है

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