| A | B |
|---|
| Angle of Elevation | The angle formed by a horizontal line and a line of sight to a point above. |
| Geometric mean | For positive numbers a and b, the positive number x such that (a/x) = (x/b). |
| Angle of depression | The angle formed by a horizontal line and a line of sight to a point below. |
| Sine | In a right triangle, the ratio of the length of the leg opposite the angle to the length of the hypotenuse. |
| Cosine | In a right triangle, the ratio of the length of the leg adjacent to the angle to the length of the hypotenuse. |
| Tangent | In a right triangle, the ratio of the length of the leg opposite the angle to the length of the leg adjacent to the angle. |
| Trigonometric ratio | A ratio of two sides of a right triangle. |
| Component form | The form of a vector that lists the vertical and horizontal change from the initial point to the terminal point. |
| Vector | A quantity that has both magnitude and direction. |
| Equal vectors | Two vectors that have the same magnitude and the same direction. |
| Parallel vectors | Vectors with the same or opposite direction. |
| Resultant vector | The vector that represents the sum of two given vectors. |
| Magnitude | The length of the vector, written as $|\vec{AB}|$ or $|\vec{v}|$ |
| Direction | The orientation of a vector, which is determined by the angle the vector makes with a horizontal line. |
