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If cosy = xcos (a+y) with cos a ne pm1 ,...

If cosy = xcos (a+y) with `cos a ne pm1` , 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)`

Text Solution

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The correct Answer is:
B
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