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cos ^(-1) "" (1- x ^(2))/( 1 + x ^(2)) क...

`cos ^(-1) "" (1- x ^(2))/( 1 + x ^(2))` के सापेक्ष `tan ^(-1) "" (2x)/( 1 - x ^(2))` का अवकलन है -

A

`1/2`

B

1

C

0

D

2

लिखित उत्तर

Verified by Experts

The correct Answer is:
B
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