જો $\theta$ લઘુકોણ હોય અને $\sin \frac{\theta}{2} = \sqrt{\frac{x - 1}{2x}}$ હોય,તો $\tan \theta$ ની કિંમત શોધો.

  • A
    $x^2 - 1$
  • B
    $\sqrt{x^2 - 1}$
  • C
    $\sqrt{x^2 + 1}$
  • D
    $x^2 + 1$

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