$\text { If } \sin ^{-1}\left(2 a / 1+a^{2}\right)-\cos ^{-1}\left(1-b^{2} / 1+b^{2}\right)=\tan ^{-1}\left(2 x / 1-x^{2}\right), \text { then prove that } x=(a-b) /(1+a b)$

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RD Sharma Solutions for Class 12 Maths Chapter 4 Inverse Trigonometric Functions Image 104