Sinusoidal Spirals
Sinusoidal Spirals
Sinusoidal spirals are given by the equation =cos(sθ), where s is rational. They are not spirals; perhaps the name comes from the similar form of the equation for the logarithmic spiral, . Change the values of s and a to see the various resulting curves, including hyperbolas, parabolas, cardioids, and lemniscates.
s
r
s
a
r=a
θ