sin(v)

cos(v)

tan(v)

O = Intersect(xAxis, yAxis)
c = Circle(O, 1)
P = Point(c)
u = Vector(O, P)
a = OrthogonalLine(P, xAxis)
A = Intersect(a, xAxis)
b = Segment(P, A)
d = OrthogonalLine(P, yAxis)
B = Intersect(d, yAxis)
e = Segment(B, P)
f = Segment(O, A)
g = Segment(B, O)
C = Intersect(c, xAxis, 2)
v = Angle(C, O, P)
Grundrelation: sin(v)^(2) + cos(v)^(2)
i = Ray(O, P)
D = Intersect(h, i)
E = Intersect(c, h, 1)
j = Segment(E, D)