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CBSE Class 12 Math 2019 Delhi Set 1 Solved Paper

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Question : 20 of 29
Marks: +1, -0
Prove that ∫0af(x) dx=∫0af(a−x) dx\int\limits_{0}^{a} f(x) \, dx = \int\limits_{0}^{a} f(a-x) \, dx, hence evaluate ∫0π  xsin⁡x1+cos⁡2x dx\int\limits_{0}^{\pi} \; \frac{x \sin x}{1+\cos^2 x} \, dx.
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