Cos Calculator
Calculate the cosine of an angle in degrees or radians. This page also shows the angle converted to radians and indicates common known-angle cases.
Cos Calculator tool
Computes:
cos(θ)
| Metric | Value |
|---|
Privacy: calculations run locally in your browser. No inputs are stored or transmitted.
This calculator converts the angle to radians internally when necessary, then evaluates the cosine function.
Common values:
cos(0°) = 1,
cos(60°) = 0.5,
cos(45°) ≈ 0.7071,
cos(90°) = 0
Examples
- 60° → cos = 0.5
- 45° → cos ≈ 0.7071
- π rad → cos = -1
FAQ
- What does this cos calculator compute?
It computes the cosine of an angle in either degrees or radians.
- Can I switch between degrees and radians?
Yes. The calculator supports both degree mode and radian mode.
- What is cosine?
In right-triangle trigonometry, cosine is adjacent divided by hypotenuse. More generally, it is the x-coordinate on the unit circle.
- Why do some results look like 0 when they should be tiny?
Very small floating-point values are rounded to 0 for readability.
- Are calculations stored?
No. Everything runs locally in your browser.