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If y= sqrt ((1-tan 2x ) /( 1+tan 2x )) ...

If ` y= sqrt ((1-tan 2x ) /( 1+tan 2x )) ,then (dy)/(dx) =`

A

` -sec ^(2)((pi)/( 4)- 2x ) sqrt ((1-tan2x)/( 1+ tan 2x) ) `

B

` sec ^(2)((pi)/( 4)- 2x ) sqrt ((1-tan2x)/( 1+ tan 2x) ) `

C

`- sec ^(2)((pi)/( 4)- 2x ) sqrt ((1+tan2x)/( 1- tan 2x) ) `

D

` sec ^(2)((pi)/( 4)- 2x ) sqrt ((1+tan2x)/( 1- tan 2x) ) `

Text Solution

Verified by Experts

The correct Answer is:
C
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