I've made a little progress . . .
I have to find the angle between two parametric curves:
I can't even find their intersection point.
Equating 's and 's:
Equate  and : .
We have: .
. . Hence: .
It turns out that is an extraneous root.
Hence, the intersection occurs at
Then  becomes: .
Therefore, the curves intersect at: .
But check my work . . . please!