x

-x

x

-x

angles opposés

déplacer le point F
comparer sin(-x) et cos(-x) avec sin(x) et cos(x)

cosinus

sinus

A = Intersect(xAxis, yAxis)
c = Circle(A, 1.0)
B, C = Intersect(c, xAxis)
D, E = Intersect(c, yAxis)
F = Point(c)
F' = Mirror(F, xAxis)
α = Angle(C, A, F)
β = Angle(F', A, C)
a = If(y(F) > 0.0, 1.0, 0.0)
γ = Angle(F, A, C)
δ = Angle(C, A, F')
b = Segment(A, F')
d = Segment(A, F)
e = Segment(A, F)
f = Segment(A, F')
g = Segment(F', F)
h = OrthogonalLine(F, yAxis)
i = OrthogonalLine(F', yAxis)
G = Intersect(yAxis, h)
H = Intersect(yAxis, i)
j = Segment(F, G)
k = Segment(F', H)