definite-integral

Question: $\int_{0}^{\pi /2}{\frac{\sin x\cos x\,dx}{{{\cos }^{2}}x+3\cos x+2}}=$



1) $\log \left( \frac{8}{9} \right)$
2) $\log \left( \frac{9}{8} \right)$
3) $\log (8\times 9)$
4) None of these
Solution: Explanation: No Explanation
Fundamental definite integration Definite integration by substitution

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