1.

If `x = a cos theta` and `y = b sin theta`, find `(dy)/(dx)`

Answer» Correct Answer - ` - (b)/(alpha) cot theta`
`(dx)/(d theta) =-a sin theta , (dy)/(d theta) = b cos theta :. (dy)/(dx) = (dy)/(d theta)/(dx)/(d theta) = (b cos theta)/(-a sin theta) =-(b)/(a) cot theta`


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