\[\sin \left( \frac{1}{2}{{\cos }^{-1}}\frac{4}{5} \right)=\] [Karnataka CET 2003]

\[\sin \left( \frac{1}{2}{{\cos }^{-1}}\frac{4}{5} \right)=\] [Karn

1.	\[\sin \left( \frac{1}{2}{{\cos }^{-1}}\frac{4}{5} \right)=\] [Karnataka CET 2003]
A.	\[\frac{1}{\sqrt{10}}\]
B.	\[-\frac{1}{\sqrt{10}}\]
C.	\[\frac{1}{10}\].
D.	\[-\frac{1}{10}\]
Answer» B. \[-\frac{1}{\sqrt{10}}\]

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\[\sin \left( \frac{1}{2}{{\cos }^{-1}}\frac{4}{5} \right)=\] [Karnataka CET 2003]

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