definite-integral

Question: $\int_{0}^{\pi /2}{\frac{\cos x}{1+\cos x+\sin x}}\,dx=$



1) $\frac{\pi }{4}+\frac{1}{2}\log 2$
2) $\frac{\pi }{4}+\log 2$
3) $\frac{\pi }{4}-\frac{1}{2}\log 2$
4) $\frac{\pi }{4}-\log 2$
Solution: Explanation: No Explanation
Fundamental definite integration Definite integration by substitution

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