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TS EAMCET · Maths · Indefinite Integration

If \(\quad \int \sin ^{-1}\left(\frac{2 x}{1+x^2}\right) d x=f(x)-\log \left(1+x^2\right)\) then \(f(x)\) is equal to

  1. A \(2 x \tan ^{-1} x\)
  2. B \(-2 x \tan ^{-1} x\)
  3. C \(x \tan ^{-1} x\)
  4. D \(-x \tan ^{-1} x\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(2 x \tan ^{-1} x\)

Step-by-step Solution

Detailed explanation

Let \(I=\int \sin ^{-1}\left(\frac{2 x}{1+x^2}\right) d x\) Put \(x=\tan \theta \Rightarrow d x=\sec ^2 \theta d \theta\)…