π6,π3\frac{\pi}{6}, \frac{\pi}{3}6π,3π
π4,π3\frac{\pi}{4}, \frac{\pi}{3}4π,3π
π3,π5\frac{\pi}{3}, \frac{\pi}{5}3π,5π
π6,π4\frac{\pi}{6}, \frac{\pi}{4}6π,4π