If \[\int{\frac{1}{1+\sin x}dx=\tan \left( \frac{x}{2}+a \right)+b}\] then

If \[\int{\frac{1}{1+\sin x}dx=\tan \left( \frac{x}{2}+a \right)+b}\]

1.	If \[\int{\frac{1}{1+\sin x}dx=\tan \left( \frac{x}{2}+a \right)+b}\] then
A.	\[a=-\frac{\pi }{4},b\in R\]
B.	\[a=\frac{\pi }{4},b\in R\]
C.	\[a=\frac{5\pi }{4},b\in R\]
D.	None of these
Answer» B. \[a=\frac{\pi }{4},b\in R\]

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If \[\int{\frac{1}{1+\sin x}dx=\tan \left( \frac{x}{2}+a \right)+b}\] then

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