Trigonometry
Right triangle + special values
Known values
Triangle
a = 3.0000
b = 4.0000
c = 5.0000
∠A = 36.8699°, ∠B = 53.1301°
sin A = 0.6000, cos A = 0.8000, tan A = 0.7500
sin B = 0.8000, cos B = 0.6000, tan B = 1.3333
Special values
| α | sin | cos | tan |
|---|---|---|---|
| 0° | 0 | 1 | 0 |
| 30° | 1/2 | √3/2 | 1/√3 |
| 45° | √2/2 | √2/2 | 1 |
| 60° | √3/2 | 1/2 | √3 |
| 90° | 1 | 0 | — |
SOH-CAH-TOA: sin = opposite/hypotenuse, cos = adjacent/hypotenuse, tan = opposite/adjacent.