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$\frac{5+\sqrt{3}}{2}$
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