definite-integral

Question: $\int_{0}^{\pi /2}{\frac{x\sin x\cos x}{{{\cos }^{4}}x+{{\sin }^{4}}x}}\,dx=$



1) 0
2) $\frac{\pi }{8}$
3) $\frac{{{\pi }^{2}}}{8}$
4) $\frac{{{\pi }^{2}}}{16}$
Solution: Explanation: No Explanation
Properties of definite integration

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