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

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

A

1.2

B

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

C

3.`(2)/(x)`

D

4.`1-x^(2)`

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The correct Answer is:
A
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