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Find the interval in which the function ...

Find the interval in which the function `f(x) =cos^(-1) ((1-x^(2))/(1+x^(2)))` is increasing or decreasing.

A

`(-oo, oo)`

B

`(-oo, 0)`

C

`(0, oo)`

D

`(1, oo)`

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The correct Answer is:
B
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DISHA PUBLICATION-APPLICATION OF DERIVATIVES -EXERCISE - 1
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