deltoid pedal curve (3)

with pedal point (x,y) is

With the pedal point opposite the cusp (i.e., at the negative x-intercept), it is the bifolium

deltoid:

• deltoid

• Tangent

• Osculating circle

deltoid pedal curve (double folium):

• deltoid pedal curve

• Tangent

• Osculating circle

(pedal point at the vertex)