COSH Section: Linux Programmer's Manual (3) Updated: June 13, 2025 Index   NAME cosh - hyperbolic cosine function   SYNOPSIS #include <math.h> double cosh(double x);   DESCRIPTION The cosh() function returns the hyperbolic cosine of x, which is defined mathematically as (exp(x) + exp(-x)) / 2.   CONFORMING TO SVID 3, POSIX, BSD 4.3, ISO 9899   SEE ALSO   Index NAME SYNOPSIS DESCRIPTION CONFORMING TO SEE ALSO This document was created by using the manual pages. Time: 11:58:02 GMT, March 24, 2025