\[\int_{0}^{\pi /2}{\frac{d\theta }{1+\tan \theta }}=\] [Roorkee 1980; MP PET 1996; DCE 1999]

\[\int_{0}^{\pi /2}{\frac{d\theta }{1+\tan \theta }}=\] [Roorkee 1980;

1.	\[\int_{0}^{\pi /2}{\frac{d\theta }{1+\tan \theta }}=\] [Roorkee 1980; MP PET 1996; DCE 1999]
A.	\[\pi \]
B.	\[\frac{\pi }{2}\]
C.	\[\frac{\pi }{3}\]
D.	\[\frac{\pi }{4}\]
Answer» E.

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\[\int_{0}^{\pi /2}{\frac{d\theta }{1+\tan \theta }}=\] [Roorkee 1980; MP PET 1996; DCE 1999]

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