COS

The COS function returns the cosine of an angle.

COS( angle )

The COS function takes an angle and returns the ratio of two sides of a right triangle. The ratio is the length of the side adjacent to the angle divided by the length of the hypotenuse. The result lies in the range -1 to 1.

The angle argument can be any valid numeric expression measured in radians.

To convert degrees to radians, multiply degrees by Pi/180. To convert radians to degrees, multiply radians by 180/Pi. Pi is approximately 3.141593.