degree of π/2
90
π/2
(0, 1)
degree of π/3
60
π/3
(1/2, √3/2)
degree of π/4
45
π/4
(√2/2, √2/2)
degree of π/6
30
π/6
(√3/2, 1/2)
degree of 0
0
0
(1, 0)
degree of 11π/6
330
11π/6
(√3/2, -1/2)
degree of 7π/4
315
7π/4
(√2/2, -√2/2)
degree of 5π/3
300
5π/3
(1/2, -√3/2)
degree of 3π/2
270
3π/2
(0, -1)
degree of 4π/3
240
4π/3
(-1/2, -√3/2)
degree of 5π/4
225
5π/4
(-√2/2, -√2/2)
degree of 7π/6
210
7π/6
(-√3/2, -1/2)