The COTANGENT of an arbitrary angle in a coordinate system is the ratio between the abscissa of a point on that angle's terminal leg and the ordinate of that point.
| Function / Angle | 0° | 30° | 45° | 60° | 90° | 180° | 270° | 360° |
| Cotangent | - |  |
1 |  |
0 | - | 0 | - |