(6,π4)\left(6, \frac{\pi}{4}\right)(6,4π)
(3,π4)\left(\sqrt{3}, \frac{\pi}{4}\right)(3,4π)
=(6,5π6)=\left(6, \frac{5 \pi}{6}\right)=(6,65π)
(6,5π4)\left(\sqrt{6}, \frac{5 \pi}{4}\right)(6,45π)