nπ−(−1)nπ6,n∈Zn \pi-(-1)^{n} \frac{\pi}{6}, n \in \mathbb{Z}nπ−(−1)n6π,n∈Z
nπ+(−1)nπ6,n∈Z\mathrm{n} \pi+(-1)^{\mathrm{n}} \frac{\pi}{6}, \mathrm{n} \in \mathbb{Z}nπ+(−1)n6π,n∈Z
nπ2−(−1)nπ12,n∈Z\frac{n \pi}{2}-(-1)^{n} \frac{\pi}{12}, n \in \mathbb{Z}2nπ−(−1)n12π,n∈Z
nπ2+(−1)nπ12,n∈Z\frac{\mathrm{n} \pi}{2}+(-1)^{\mathrm{n}} \frac{\pi}{12}, \mathrm{n} \in \mathbb{Z}2nπ+(−1)n12π,n∈Z