Lengkapilah tabel dimana ​

0 | 1 | ~ | -1 | 0 | 1 | ~ | -1 | 0 |

(0,0) | ( (π/4),1 ) | ( (π/2),~ ) | ( (3π/4),-1 ) | (π,0) |

( (5π/4),1) )| ( (3π/2),~ ) | ( (7π/4),-1 ) | (2π,0) |