COS Section: Linux Programmer's Manual (3) Updated: June 8, 2025 Index   NAME cos - cosine function   SYNOPSIS #include <math.h> double cos(double x);   DESCRIPTION The cos() function returns the cosine of x, where x is given in radians.   RETURN VALUE The cos() function returns a value between -1 and 1.   CONFORMING TO SVID 3, POSIX, BSD 4.3, ISO 9899   SEE ALSO   Index NAME SYNOPSIS DESCRIPTION RETURN VALUE CONFORMING TO SEE ALSO This document was created by using the manual pages. Time: 11:58:02 GMT, March 24, 2025