definite-integral

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



1) $\log \frac{4}{3}$
2) $\log \frac{1}{3}$
3) $\log \frac{3}{4}$
4) None of these
Solution: Explanation: No Explanation
Fundamental definite integration Definite integration by substitution

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