2nπ±π62 n \pi \pm \frac{\pi}{6}2nπ±6π
2nπ±π32 n \pi \pm \frac{\pi}{3}2nπ±3π
nπ±π6\mathrm{n} \pi \pm \frac{\pi}{6}nπ±6π
nπ±π3\mathrm{n} \pi \pm \frac{\pi}{3}nπ±3π