30⁰

45⁰

60⁰

Найдите:
1)sin 30⁰
2)cos 60⁰
3)cos 120⁰
4)sin 180⁰
5)cos 270⁰

sin 30⁰=1/2
cos 120⁰=1/2

cos 60⁰=1/2

sin 180⁰=0

cos 270⁰

A = Point(xAxis)
B = (0, 1)
c = Circle(A, B)
C = Point(xAxis)
D = Point(yAxis)
E = Point(c)
a = Segment(E, C)
b = Segment(D, E)