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int (1)/((1+x^(2))sqrt(1-x^(2)))dx is eq...

`int (1)/((1+x^(2))sqrt(1-x^(2)))dx` is equal to

A

`sqrt((x^(2)+1)/(x^(2)-1))+c`

B

`sqrt((x^(2)-1)/(x^(2)+1))+c`

C

`sqrt(x^(4)-1)+c`

D

none of these

Text Solution

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The correct Answer is:
A
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