$\tan \frac{A}{2}$ એ કોના બરાબર છે?

  • A
    $\pm \sqrt{\frac{1 - \sin A}{1 + \sin A}}$
  • B
    $\pm \sqrt{\frac{1 + \sin A}{1 - \sin A}}$
  • C
    $\pm \sqrt{\frac{1 - \cos A}{1 + \cos A}}$
  • D
    $\pm \sqrt{\frac{1 + \cos A}{1 - \cos A}}$

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