.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
.\" May be distributed under the GNU General Public License
.\" References consulted:
.\"     Linux libc source code
.\"     Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
.\"     386BSD man pages
.\" Modified Sat Jul 24 19:51:25 1993 by Rik Faith (faith@cs.unc.edu)
.TH COSH 3  "June 13, 1993" "" "Linux Programmer's Manual"
.SH NAME
cosh \- hyperbolic cosine function
.SH SYNOPSIS
.nf
.B #include <math.h>
.sp
.BI "double cosh(double " x );
.fi
.SH DESCRIPTION
The \fBcosh()\fP function returns the hyperbolic cosine of \fIx\fP, which 
is defined mathematically as exp(x) + exp(-x) / 2.
.SH "CONFORMING TO"
SVID 3, POSIX, BSD 4.3, ISO 9899
.SH SEE ALSO
.BR acosh "(3), " asinh "(3), " atanh "(3), " sinh "(3), " tanh (3)