Change the parametrization constant:
\(-3\)\(3\)
\(a=\)
Track the black dot:
\(-6\)\(6\)
\(t=\)
Change the radius:
\(0.1\)\(2\)
\(r=\)

The curve \(\mathbf{c}(t) = (r\cos(at),r\sin(at))\)

The circle can be given as \(x^2+y^2 =\:\)\(1\)