A = Intersect(xAxis, yAxis)
B = (10, 0)
V = Vector(A, B)
α = 0.18029251173101424 rad (slider from 10*° to 40*°, step 0.01*°)
E: (2 / sin(α); (-α))
C = Point(E)
IXs = Vector(C, B)
a = OrthogonalLine((0, 0), IXs, xOyPlane)
D = Point(a)
I = Vector(A, D)
β = Angle(E, V)
Θ = Angle(V, I)