P´

b = 4.5 (slider from 0 to 6)
M: (0, 3)
P: (0, b)
f = Segment(P, M)
a: π
t = 10.8 (slider from 0 to 40, step 0.1)
R: (((b - 3) * sin((t * (360°) / (((2 * π) * 3))))) + t, 3 + ((b - 3) * cos((t * (360°) / (((2 * π) * 3))))))
Ortslinie1 = Locus(R, t)
d = Circle(M, 3)