| A | B |
|---|
| Cosine Function | in a right triangle where the angle is equal to the adjacent/hypotenuse. |
| Coterminal Angle | two angles in standard position with terminal sides that coincide. |
| Law of Cosines | if triangle ABC has sides of lengths a, b, and c, then a^2 = b^ + c^2 - 2(b)(c)cosA. |
| Law of Sines | if triangle ABC has sides of lengths a, b, and c, then a/Sin A = b/Sin B = c/Sin C. |
| Parametric Equations | equations that express two variables in terms of a third variable, called the parameter. |
| Radian | In a circle with radius r and center at the origin, one radian is the measure of an angle in standard position whose terminal side intercepts an arc of length r. |
| Reference Angle | if an angle is in standard position, this angle is the acute angle formed by the terminal side of the original angle and the x-axis. |
| Sector | a region of a circle that is bounded by two radii and an arc of the circle. |
| Sine Function | in a right triangle where the angle is equal to the opposite/hypotenuse. |
| Tangent Function | in a right triangle where the angle is equal to the opposite/adjacent. |
