1.

If `y=cos^(-1)((2x)/(1+x^2)),t h e n(dy)/(dx)i s``(-2)/(1+x^2)`for all `x`(b) `(-2)/(1+x^2)`for all `|x|1`(d) none of theseA. `(-2)/(1+x^(2))` for all xB. `(-2)/(1+x^(2))" for all "|x|gt1`C. `(2)/(1+x^(2))" for "|x|lt1`D. none of these

Answer» Correct Answer - D


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