2nπ±π32 n \pi \pm \frac{\pi}{3}2nπ±3π
2nπ+π62 n \pi+\frac{\pi}{6}2nπ+6π
2nπ−π62 \mathrm{n} \pi-\frac{\pi}{6}2nπ−6π
2nπ+π32 n \pi+\frac{\pi}{3}2nπ+3π