definite-integral

Question: $\int_{\ -\pi }^{\pi }{\frac{{{\sin }^{4}}x}{{{\sin }^{4}}x+{{\cos }^{4}}x}\ dx}=$



1) $\pi /4$
2) $\pi /2$
3) $3\pi /2$
4) $\pi $
Solution: Explanation: No Explanation
Properties of definite integration

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