\[\int_{0}^{1}{\sqrt{\frac{1-x}{1+x}}}\,dx\] equals [RPET 1997; IIT Screening 2004]

\[\left( \frac{\pi }{2}+1 \right)\]

\[\left( \frac{\pi }{2}-1 \right)\]

\[\int_{0}^{1}{\sqrt{\frac{1-x}{1+x}}}\,dx\] equals

1.	\[\int_{0}^{1}{\sqrt{\frac{1-x}{1+x}}}\,dx\] equals [RPET 1997; IIT Screening 2004]
A.	\[\left( \frac{\pi }{2}-1 \right)\]
B.	\[\left( \frac{\pi }{2}+1 \right)\]
C.	\[\frac{\pi }{2}\]
D.	\[(\pi +1)\]
Answer» B. \[\left( \frac{\pi }{2}+1 \right)\]

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\[\int_{0}^{1}{\sqrt{\frac{1-x}{1+x}}}\,dx\] equals [RPET 1997; IIT Screening 2004]

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