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

The derivative of `cos^(-1)`(2`x^2` -1) w.r.t. `cos^(-1)` x is ........... A) 2 B) -2 C) 0 D) 1

A

2

B

-2

C

`frac{1}{2`sqrt (1-`x^2`)`}

D

`frac{-2}{`sqrt (1-`x^2`)`}

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