definite-integral

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



1) 0
2) $\frac{2}{15}$
3) $\frac{4}{15}$
4) None of these
Solution: Explanation: No Explanation
Summation of series by definite Integration

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