If $\int \frac{1}{1+\sin x} d x=\tan \left(\frac{x}{2}+a\right)+C,$ th – InterviewSolution

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1.	If $\int \frac{1}{1+\sin x} d x=\tan \left(\frac{x}{2}+a\right)+C,$ then(a) $\hat{a}=-\frac{\pi}{4}, C \in R \quad(B) a=\frac{\pi}{4}, C \in R \quad(C) a=\frac{5 \pi}{4}, C \in R \quad(D) a=\frac{\pi}{3}, C \in R$
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