1.

\[\frac{d}{dx}({{\sin }^{-1}}x)\] is equal to                                                                    [RPET 1995]

A.          \[\frac{1}{\sqrt{1-{{x}^{2}}}}\]
B.   \[-\frac{1}{\sqrt{1-{{x}^{2}}}}\]
C.            \[\frac{1}{\sqrt{1+{{x}^{2}}}}\]
D.   \[\frac{-1}{\sqrt{1+{{x}^{2}}}}\]
Answer» B.   \[-\frac{1}{\sqrt{1-{{x}^{2}}}}\]


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