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If y =(cos x -sin x )/( cos x + si nx ) ...

`If y =(cos x -sin x )/( cos x + si nx ) ,the n(dy)/(dx) = `

A

` (2)/( 1+sin 2x ) `

B

` (-2)/( 1+sin 2x) `

C

` (1)/( 1+sin 2x ) `

D

` (-1)/( 1+sin 2x) `

Text Solution

Verified by Experts

The correct Answer is:
B
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