Observer les coordonnés du point M, et les cosinus et sinus de l'angle θ. 
Que remarque-t-on? 

A = Intersect(xAxis, yAxis)
B = Point(yAxis)
c = Circle(A, B)
M = Point(c)
a = OrthogonalLine(M, xAxis)
b = OrthogonalLine(M, yAxis)
D = Intersect(a, xAxis)
OE_1 = Segment(D, M)
E = Intersect(b, yAxis)
OD_1 = Segment(E, M)
OM = Segment(A, M)
θ = Angle(D, A, M)
sinθ: sin(θ)
cosθ: cos(θ)
g: x(D)
OD = Segment(A, D)
OE = Segment(A, E)