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cos^(-1)((1-x^(2n))/(1+x^(2n)))...

`cos^(-1)((1-x^(2n))/(1+x^(2n)))`

Text Solution

Verified by Experts

The correct Answer is:
`(-2)/(1-x^2)`
(ii) `(2n. X^(n-1))/(1+x^(2n)`
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