If y=(cos x - sin x)/(cos x + sinx), the...

If `y=(cos x - sin x)/(cos x + sinx)`, then `((d^(2)y)/(dx^(2)))/((dy)/(dx))`

A

y

B

`-2y`

C

3y

D

`-4y`

Verified by Experts

The correct Answer is:

B

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