π/2
π
3π/2
2π
1
π
2π
π
2π
2
π/4
π/2
3π/4
π
3
2π/3
4π/3
2π
π/3
4
3π/8
3π/4
9π/8
3π/2
|
|
| |||
| π/2 | π | 3π/2 | 2π | |
| 1 | π | 2π | π | 2π |
| 2 | π/4 | π/2 | 3π/4 | π |
| 3 | 2π/3 | 4π/3 | 2π | π/3 |
| 4 | 3π/8 | 3π/4 | 9π/8 | 3π/2 |