https://www.geogebra.org/haftendorn
Haftendorn, Buch (Springer):
Kurven erkunden und verstehen
Kap 8.1.2.4: S. 228
www.kurven-erkunden-und-verstehen.de

Ha 2016

a = 0.4
r(x) = exp((a * x))
ω = 1.0471975511965974
r_d(x) = r(x - ω)
k = 0.5 (slider from -5 to 5, step 0.01)
r_k(x) = (k * r(x))
b = CurveCartesian((r(t) * cos(t)), (r(t) * sin(t)), t, -10, 7)
c = CurveCartesian((r_d(t) * cos(t)), (r_d(t) * sin(t)), t, -10, 7)
d = CurveCartesian((r_k(t) * cos(t)), (r_k(t) * sin(t)), t, -10, 7)
P = Point(b)
O: (0, 0)
e = Circle(O, P)
f = Ray(O, P)
P_d = Point(e)
A, B, C, D, P_k, F = Intersect(f, d)
g: ω / °
h: log(2) / a
i: h / °
j: exp((-0.4 * π / 3))
l = false