nπ−π6,n∈Zn \pi-\frac{\pi}{6}, n \in \mathbb{Z}nπ−6π,n∈Z
nπ−π2,n∈Zn \pi-\frac{\pi}{2}, n \in \mathbb{Z}nπ−2π,n∈Z
nπ+π6,n∈Zn \pi+\frac{\pi}{6}, n \in \mathbb{Z}nπ+6π,n∈Z
nπ+π2,n∈Zn \pi+\frac{\pi}{2}, n \in \mathbb{Z}nπ+2π,n∈Z