\[\begin {array} {1 1} (1)\;\{2n\pi \pm \frac{\pi}{4}+\frac{\pi}{12}:n \in Z\} & \quad (2)\;\{2n\pi \pm \frac{\pi}{4}-\frac{\pi}{12}:n \in Z\} \\ (3)\;\{n\pi + (-1)^n \frac{\pi}{4}+\frac{\pi}{12}:n \in Z\} & \quad (4)\;\{n\pi + (-1)^n \frac{\pi}{4}-\frac{\pi}{12}:n \in Z\} \end {array}\]