Calculus
{(1,π6),(1,5π6)}\(\displaystyle\)\{(1,\(\frac{\pi}{6}\)),(1,\(\frac{5\pi}{6}\))\}
{(1,π2),(1,3π2)}\(\displaystyle\)\{(1,\(\frac{\pi}{2}\)),(1,\(\frac{3\pi}{2}\))\}
{(1,π6),(1,5π6),(1,7π6),(1,11π6)}\(\displaystyle\)\{(1,\(\frac{\pi}{6}\)),(1,\(\frac{5\pi}{6}\)),(1,\(\frac{7\pi}{6}\)),(1,\(\frac{11\pi}{6}\))\}
{(1,0),(1,π)}\{(1,0),(1,\(\pi\))\}