1.

If \[\tan ({{\cos }^{-1}}x)=\sin \left( {{\cot }^{-1}}\frac{1}{2} \right)\], then x =

A. \[\pm \frac{5}{3}\]
B. \[\pm \frac{\sqrt{5}}{3}\]
C. \[\pm \frac{5}{\sqrt{3}}\]
D. None of these
Answer» C. \[\pm \frac{5}{\sqrt{3}}\]


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