$\sqrt{2+\sqrt{2+\sqrt{2+2 \cos 8 \theta}}} = $

  • A
    $\sin 2 \theta$
  • B
    $2 \cos \theta$
  • C
    $2 \sin \theta$
  • D
    $2 \cos \frac{\theta}{2}$

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

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