1.

If `sin^(-1) ((2a)/(1+a^2))+ sin^(-1) ((2b)/(1+b^2)) = 2 tan^(-1)x` then `x=`A. `(a-b)/(1+ab)`B. `(b)/(1+ab)`C. `(b)/(1-ab)`D. `(a+b)/(a-ab)`

Answer» Correct Answer - D


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