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

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

If x =a cos theta , y =b sin theta then (dy)/(dx) =

If x= a cos^(3) theta, y= b sin^(3) theta, " then "(dy)/(dx)= (b)/(a) tan theta .

x=a cos theta,y=b sin theta then find dy/dx

If x = a( sin theta - theta cos theta) and y = a ( cos theta + theta sin theta) " find " (dy)/(dx) at theta = pi/4

If x = sin theta - cos theta and y = sin theta + cos theta , then (dy)/(dx) =

If x=cos theta-cos 2theta and y=sin theta-sin2theta , then find (dy)/(dx) .

If x=a(theta-sin theta) and,y=a(1+cos theta) find (dy)/(dx) at theta=(pi)/(3)

If x = a(cos theta + log tan(theta/2)), y = a sin theta find dy/dx at theta = pi/3