Determines the cosine of a given number either in radians or in degrees.This function is valid in v2.0.0 to v2.13.1. This function has been downloaded 27 times.
anglewill be interpreted in degrees, otherwise
anglewill be interpreted in radians.
anglein radians by default, but if
true-ish value then the cosine of
anglein degrees will be returned.
This function requires the following function which is included automatically: