The evolute of a hypotrochoid is a complicated equation. Examples are illustrated above.
Hypotrochoid Evolute
See also
Evolute, HypotrochoidExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Hypotrochoid Evolute." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/HypotrochoidEvolute.html