Here's another one that he didn't go over & I am totally lost on.

Determine the angle between the two curves to the nearest degree for the curves at each point of intersection. Note they are not orthogonal trajectories.

a. y=x^2 and y=(x-2)^2

b. x^2 - y^2=3 and x^2 - 4x+y^2 +3=0

Thanks again!