Cosine Calculator
Enter one finite angle, choose degrees or radians, and calculate its cosine with JavaScript Math.cos.
A QUICK WALKTHROUGH
How to use this tool
- Enter a finite angle.
- Choose degrees or radians.
- Calculate and read the result.
Degrees and radians
Degrees are converted with angle × π ÷ 180. Radian values are passed directly to Math.cos.
Input boundaries
The input must be a finite number. Empty, non-numeric, Infinity, and NaN values are rejected. Calculations stay in this browser.
GOOD TO KNOW
Common questions
Which function does this use?
It uses the browser’s built-in Math.cos function.
Can I enter a very large angle?
Yes, if it is finite. JavaScript handles the radian conversion and cosine calculation.