If cos y=x cos(a+y) with cos ne +- 1, th...

If `cos y=x cos(a+y)` with `cos ne +- 1`, then `dy/dx` is equal to

A

`(sina)/(cos^2(a+y))`

B

`(cos^2(a+y))/(sina)`

C

`(cosa)/(sin^2(a+y))`

D

`(cos^2(a+y))/(cosa)`

Verified by Experts

The correct Answer is:

B

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