1.

If \[y={{\sin }^{-1}}\frac{\sqrt{(1+x)}+\sqrt{(1-x)}}{2}\], then \[\frac{dy}{dx}=\]

A.            \[\frac{1}{\sqrt{(1-{{x}^{2}})}}\]
B.            \[-\frac{1}{\sqrt{(1-{{x}^{2}})}}\]
C.            \[-\frac{1}{2\sqrt{(1-{{x}^{2}})}}\]
D.            None of these
Answer» D.            None of these


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