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यदि `-1 lt xlt 1," तो "2 tan^(-1)x=` ?A. `sin^(-1)""(2x)/(1+x^(2))`B. `sin^(-1)""(2x)/(1-x^(2))`C. `sin^(-1)""(1-x^(2))/(1+x^(2))`D. `sin^(-1)""(1+x^(2))/(1-x^(2))`

Answer» Correct Answer - A


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