The slope of tangent to the curve x= 1-a...

The slope of tangent to the curve `x= 1-a sin theta, y = b cos^(2) theta" at "theta = (pi)/(2)` is:

A

`(a)/(2b)`

B

`(a)/(b)`

C

`(2b)/(a)`

D

`(b)/(a)`

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The correct Answer is:

C

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