Determines the cosine of a given number either in radians or in degrees.This function is valid in v2.0.0 to v2.14.2. This function has been downloaded 2 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: