Have no idea how to solve this problem.
Problem:
Parameterize the curve of the intersection of the surfaces and z=x+2y the point (3,0,3) should correspond to the point t=0.
The first equation is a circle of radius 3. So I know that paramterization should be
x=3sin(t*pi)
y=3cos(t*pi)
No idea how to solve for the intersection of the two though.