# Cos

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*This function is for BASIC compatibility. It is not available in pure JavaScript projects.*

Cos(*number*)

## Description

Cos calculates the cosine of a number expressing an angle in radians. The required parameter, *number*, is any numeric expression. The value returned is a double-precision floating-point number that can range from -1 to 1.

To convert degrees to radians, multiply degrees by π/180. To convert radians to degrees, multiply radians by 180/π.

## Example (Basic)

Rem Cos Example 'Cos calculates the cosine of a number Print "The cosine of 0 is " & Cos(0)

## Output

The cosine of 0 is 1