MCQ
$\tan \frac{1}{2}\left(\cos ^{-1} \frac{\sqrt{5}}{3}\right)=?$
  • $\frac{3-\sqrt{5}}{2}$
  • B
    $\frac{3+\sqrt{5}}{2}$
  • C
    $\frac{5-\sqrt{3}}{2}$
  • D
    $\frac{5+\sqrt{3}}{2}$

Answer

Correct option: A.
$\frac{3-\sqrt{5}}{2}$
A

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