\[{{\cos }^{-1}}\sqrt{1-x}+{{\sin }^{-1}}\sqrt{1-x}=\]

1.	\[{{\cos }^{-1}}\sqrt{1-x}+{{\sin }^{-1}}\sqrt{1-x}=\]
A.	\[\pi \]
B.	\[\frac{\pi }{2}\]
C.	1
D.	0
Answer» C. 1

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\[{{\cos }^{-1}}\sqrt{1-x}+{{\sin }^{-1}}\sqrt{1-x}=\]

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