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If cosy=xcos(a+y) , with cosa!=+-1 , pro...

If `cosy=xcos(a+y)` , with `cosa!=+-1` , prove that `(dy)/(dx)=(cos^2(a+y))/(sina)` .

A

` (-cos (a+y))/( sin ( a+y) -xsin y )`

B

` (cos (a+y))/( sin ( a+y) -sin y )`

C

` (-cos (a+y))/( xsin (a+y) -sin y)`

D

` (cos (a+y))/( xsin (a+y) -sin y)`

Text Solution

Verified by Experts

The correct Answer is:
D
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