Cercle trigonométrique (1)

sin(α)

cos(α)

A = Intersect(xAxis, yAxis)
c = Circle(A, 1)
B = Point(c)
C: (x(B), 0)
D: (0, y(B))
b = Segment(D, B)
d = Segment(B, C)
texte1: "sin(α)=" + (y(B)) + ""
texte2: "cos(α)= " + (x(B)) + ""
f = Segment(A, B)
α = Angle(C, A, B)
Curve(x) = ?