Cosine Calculator
Calculate the cosine of an angle in degrees. Also shows sine and tangent.
deg
Cosine Val
0.50000000
Sine Val0.86602540
Tangent Val1.73205081
Formule
## Cosine Function ### Definition In a right triangle, **cos(angle) = adjacent / hypotenuse**. On the unit circle, cos(angle) is the x-coordinate of the point at that angle. ### Key Values | Angle | cos | |-------|-----| | 0° | 1 | | 30° | √3/2 ≈ 0.8660 | | 45° | √2/2 ≈ 0.7071 | | 60° | 0.5 | | 90° | 0 |
Exemple Résolu
Calculate cos(60°).
- 01cos(60°) = 0.5
- 02sin(60°) = √3/2 ≈ 0.8660
- 03tan(60°) = √3 ≈ 1.7321
Questions Fréquentes
What is the cosine function?
Cosine gives the ratio of the adjacent side to the hypotenuse in a right triangle, or the x-coordinate on the unit circle.
How are sine and cosine related?
sin²(x) + cos²(x) = 1 (Pythagorean identity). Also, cos(x) = sin(90° - x) and vice versa.
When is cosine zero?
Cosine equals zero at 90° and 270° (and every 180° offset from those).
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