# Cosine calculator online: Calculate cosine of radians and degrees

You can calculate the cosine of radians and degrees by the command cos. Please input cos 1 2 3 in the search form above and press the enter key. Here is the output.

The values in red are cos(1), cos(2), cos(3). All the values you input should be integers or decimals and separated by a space. The default unit of input values is radian. If you want to input degrees, write d after a value like 90d or 180d.