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The derivative of cos^(-1)(2x^(2) - 1) w...

The derivative of `cos^(-1)(2x^(2) - 1)` w.r.t `cos^(-1) x` is

A

2

B

`(2)/(x)`

C

1- `x^(2)`

D

`(-1)/(2 sqrt(1-x^(2))`

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The correct Answer is:
A
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