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If y= cos^(-1)((2x)/(1+x^(2))), then (dy...

If `y= cos^(-1)((2x)/(1+x^(2)))`, then `(dy)/(dx)` is -

A

`(-2)/(1+x^(2))` for all x

B

`(-2)/(1+x^(2))` for all `|x| lt 1`

C

`(2)/(1+x^(2))` for `|x| gt 1`

D

none of these

Text Solution

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The correct Answer is:
B, C
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