K=(θ, r(θ))

θ

https://www.geogebra.org/haftendorn
Haftendorn, Buch (Springer):
Kurven erkunden und verstehen
Kap 4.4.1.5: S. 113

Ha 2016

e = 3
O = (0, 0)
θ = 0.54 (slider from -1 to 7, step 0.01)
r(x) = (e * sqrt((2 * cos((2 * x)))))
P_p: (r(θ); θ)
Ortslinie5 = Locus(P_p, θ)
K: (θ, r(θ))
K': (θ, 0)
a = Segment(K, K')
b = false