 |  | ![1/3[2cost-cos(2t)]](/images/equations/DeltoidEvolute/Inline3.svg) |
(1)
|
 |  | ![1/3[2sint-sin(2t)]](/images/equations/DeltoidEvolute/Inline6.svg) |
(2)
|
is a hypocycloid evolute for 
 |  |  |
(3)
|
 |  |  |
(4)
|
which is another deltoid scaled by a factor 
and rotated 
of a turn.
Deltoid Evolute
See also
Deltoid, Deltoid InvoluteExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Deltoid Evolute." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/DeltoidEvolute.html