COS

Syntax: COS (radians)
Location: QL ROM

This function allows you to find the cosine of the specified angle (given in radians).

NOTE:
COS with very large values for the angle produces either very odd results or an overflow error (except on Minerva v1.96+ where it returns 0). The correct range for radians is -PI...PI, because anything outside this range is actually merely a repeat of the series. This is because an angle of PI*2 radians forms a complete circle, therefore an angle of PI*3 is actually the same as an angle of PI (ie. PI*3-PI*2). If you insist on using these silly angles, try SIN (X+PI/2) instead of COS(X).

CROSS-REFERENCE:
See SIN, ACOS. 
Compare COSH.
