from sympy import *
from spb import *
x, a, s, e = symbols("x a s, e")
plot_parametric(
    cos(a * x), sin(x), prange(x, s*pi, e*pi),
    params={
        a: (0.5, 0, 2),
        s: (0, 0, 2),
        e: (2, 0, 2),
    },
    aspect="equal",
    xlim=(-1.25, 1.25), ylim=(-1.25, 1.25)
)