MCQ
$\int\limits_0^{\frac{\pi }{2}} {\frac{{x\sin x\cos x}}{{{{\cos }^4}x + {{\sin }^4}x}}dx = ..........} $
- A$\frac{\pi }{4}$
- ✓$\frac{{{\pi ^2}}}{{16}}$
- C$\frac{{{\pi ^2}}}{4}$
- D$\frac{\pi }{{16}}$
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