1.

If `y=cos^(-1)((2x)/(1+x^(2)))`, then `(dy)/(dx)` is equal toA. `-(2)/(1+x^(2))" for all " |x|lt1`B. `-(2)/(1+x^(2))" for all "|x|gt1`C. `(2)/(1+x^(2))" for all " |x|lt1`D. None of these

Answer» Correct Answer - A


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