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d/dx [cos^(-1)((1-x^(2))/(1+x^(2)))] at ...

`d/dx [cos^(-1)((1-x^(2))/(1+x^(2)))]` at x = -1/sqrt2`.

A

4

B

(4/3)

C

(-4/3)

D

(-4)

Text Solution

Verified by Experts

The correct Answer is:
C
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