The cure has parametric equations
x(t)=2-3costetha
y(t)=4sintetha
find an expression for dy/dx as a function of tetha
B) Find the coordiantes of the points c when the tangent to c is parallel to the y axis
c) Locate and cklassify the stationary points on the curve with the equation y=x^3+3x^2+3x-6
