2nπ±π42 n \pi \pm \frac{\pi}{4}2nπ±4π
2nπ+π42 n \pi+\frac{\pi}{4}2nπ+4π
nπ+π6\mathrm{n} \pi+\frac{\pi}{6}nπ+6π
nπ−π6\mathrm{n} \pi-\frac{\pi}{6}nπ−6π