Trigonometric Functions
Trigonometry deals with the relationship between angles and sides of triangles. The six primary trig functions are defined for a right triangle or the unit circle.
sin(θ) = opposite / hypotenuse
cos(θ) = adjacent / hypotenuse
tan(θ) = opposite / adjacent = sin/cos
cos(θ) = adjacent / hypotenuse
tan(θ) = opposite / adjacent = sin/cos
Key Angle Values
| Angle | sin | cos | tan |
|---|---|---|---|
| 0° | 0 | 1 | 0 |
| 30° | 0.5 | 0.866 | 0.577 |
| 45° | 0.707 | 0.707 | 1 |
| 60° | 0.866 | 0.5 | 1.732 |
| 90° | 1 | 0 | undefined |