Question

If $\underset{0}{\overset{\pi }{\int }}xf(\sin x)dx=k\underset{0}{\overset{\pi }{\int }}f(\sin x)dx$, then $k$ equals

• A. $\pi$
• B. $\frac{\pi }{2}$
• C. $\frac{\pi }{4}$
• D. 1

Answer 1

Answer: (B)

Correct answer is (b) $\frac{\pi }{2}$