KcetInverse Trigonometric FunctionsKCET 2018MCQ+1 / -02018The value of the expression $\tan \left(\frac{1}{2} \cos ^{-1} \frac{2}{\sqrt{5}}\right)$ isA$2-\sqrt{5}$B$\sqrt{5}-2$C$\frac{\sqrt{5}-2}{2}$D$5-\sqrt{2}$Check AnswerClear SelectionReveal AnswerShow Explanation