nπ+π6n \pi+\frac{\pi}{6}nπ+6π
nπ−π6n \pi-\frac{\pi}{6}nπ−6π
2nπ+π62 n \pi+\frac{\pi}{6}2nπ+6π
2nπ−π62 n \pi-\frac{\pi}{6}2nπ−6π