If sin-1 2a1+a2 - cos-1 1-b21+b2 = tan-1 2x1-x2 , then prove that x=a-b1+ab

If $\sin^{- 1} \frac{2 a}{1 + a^{2}} - \cos^{- 1} \frac{1 - b^{2}}{1 + b^{2}} = \tan^{- 1} \frac{2 x}{1 - x^{2}}$ , then prove that $x = \frac{a - b}{1 + a b}$

Matching exercise

Match the items on the right to the items on the left.

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