α = 5.69 (slider from 0 to 6.28, step 0.01)
A: (2.0 * cos(α), -(2.0) * sin(α))
B = Intersect(xAxis, yAxis)
Vd = Vector(B, A)
c = Circle(B, A)
C: (cos(α), sin(α))
Vr = Vector(B, C)
d = Circle(B, C)
D: (3.0 * cos(α), -sin(α))
Vrésult = Vector(B, D)
a = Segment(D, C)
b = Segment(D, A)
E: (2.0 * cos(α), -(2.0) * sin(α))
F: (-cos(α), -sin(α))
Ir = Vector(B, F)
G: (cos(α), -(3.0) * sin(α))
e = Segment(E, G)
f = Segment(F, G)
Irésult = Vector(B, G)
β = Angle(G, B, D)