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JEE Mains · Maths · STD 12 - 7.1 indefinite integral

समाकल \(\int x \cos ^{-1}\left(\frac{1-x^{2}}{1+x^{2}}\right) d x,(x >0)\) बराबर है

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

Answer & Solution

Correct Answer

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

Step-by-step Solution

Detailed explanation

(a) Let \(I=\int x \cos ^{-1}\left(\frac{1-x^{2}}{1+x^{2}}\right) d x\) \(\therefore {\rm{I}} = 2\int {\mathop x\limits_{II} } \mathop {{{\tan }^{ - 1}}}\limits_I xdx\) Applying Integration by parts…
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