cosinus

sinus

 \frac{ \pi }{2 } 

 \frac{3 \pi }{2 } 

\pi

0

O = (-1.6321033606763338, 1.8799575740090235)
c = Circle(O, 1)
I1: (x(O) + 1, y(O))
I2: (x(O), y(O) + 1)
P = Point(c)
I3: (x(O) - 1, y(O))
I4: (x(O), y(O) - 1)
a = Segment(I1, I3)
b = Segment(I2, I4)
d = Segment(O, P)
α = Angle(I1, O, P)
e = true
f = true
g = OrthogonalLine(P, a)
A = Intersect(g, a)
h = OrthogonalLine(P, b)
B = Intersect(h, b)
cosα = Segment(O, A)
sinα = Segment(O, B)
k = Segment(P, A)
l = Segment(P, B)
D: (0, cos(α))
E: (0, sin(α))
C: (α, 0)
text5: "sin(α)=" + (sin(α))
text6: "cos(α)=" + (cos(α))