tanx = 

x = 

sinx = 

x

O = (0, 0)
c = Circle(O, 1.0)
I = (1, 0)
M = Point(c)
d = CircleArc(O, I, M)
C: (x(M), 0.0)
a = Segment(O, M)
sinx = Segment(M, C)
texte6: d + ""
texte8: sinx + ""
tanx_1 = OrthogonalLine(M, a)
B = Intersect(tanx_1, xAxis)
tanx = Segment(M, B)
J = Point(c)
texte1: tanx + ""
α = Angle(O, M, B)