Perhaps the following connections between various mathematical concepts will
be helpful.
When in doubt, just remember the alphabetical order.
| X-coordinate | Y-coordinate |
| Abscissa | Ordinate |
| Domain | Range |
| Cosine | Sine |
| X-coordinate (of unit circle) | Y-coordinate (of unit circle) |
| Adjacent / Hypotenuse (in right triangle) | Opposite / Hypotenuse (in right triangle) |