Steep volume pedal curve - Profiler - Questions and answers - Kemper Profiler Forum
Essay 1 : What is a pedal curve?
Pedal curve - Wikipedia
Pedal curve - Wikipedia
Ellipse Pedal Curve -- from Wolfram MathWorld
Pedal curve – GeoGebra
Pedal Curve -- from Wolfram MathWorld
calculus - Show that the pedal equation of the curve $x=a(2\cos t-\cos2t),\ y=a(2\sin t-\sin2t)$ is $9(r^2-a^2 )=8p^2$ - Mathematics Stack Exchange