$\tan \left[ \frac{1}{2} \cos^{-1} \left( \frac{\sqrt{5}}{3} \right) \right] = $

  • A
    $\frac{3 - \sqrt{5}}{2}$
  • B
    $\frac{3 + \sqrt{5}}{2}$
  • C
    $\frac{2}{3 - \sqrt{5}}$
  • D
    इनमें से कोई नहीं

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