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TS EAMCET · Maths · Definite Integration

\(\int_0^\pi x f(\sin x) d x\) is equal to

  1. A \(2 \pi \int_0^{\frac{\pi}{4}} f(\sin x) d x\)
  2. B \(\pi \int_0^{\frac{\pi}{4}} f(\sin x) d\)
  3. C \(2 \pi \int_0^{\frac{\pi}{2}} f(\sin x) d x\)
  4. D \(\pi \int_0^{\frac{\pi}{2}} f(\sin x) d x\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(\pi \int_0^{\frac{\pi}{2}} f(\sin x) d x\)

Step-by-step Solution

Detailed explanation

\(\begin{aligned} & \text { Let } I=\int_0^\pi x f(\sin x) d x \\ & \Rightarrow \quad I=\int_0^\pi(\pi-x) f[\sin (\pi-x)] d x\end{aligned}\)…