1.\" Copyright (c) 1989, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" %sccs.include.redist.man% 5.\" 6.\" @(#)cosh.3 8.1 (Berkeley) 06/04/93 7.\" 8.Dd 9.Dt COSH 3 10.Os 11.Sh NAME 12.Nm cosh 13.Nd hyperbolic cosine function 14.Sh SYNOPSIS 15.Fd #include <math.h> 16.Ft double 17.Fn cosh "double x" 18.Sh DESCRIPTION 19The 20.Fn cosh 21function computes the hyperbolic cosine of 22.Fa x . 23.Sh RETURN VALUES 24The 25.Fn cosh 26function returns the hyperbolic cosine unless the magnitude 27of 28.Fa x 29is too large; in this event, the global variable 30.Va errno 31is set to 32.Er ERANGE . 33.Sh SEE ALSO 34.Xr acos 3 , 35.Xr asin 3 , 36.Xr atan 3 , 37.Xr atan2 3 , 38.Xr cos 3 , 39.Xr sin 3 , 40.Xr sinh 3 , 41.Xr tan 3 , 42.Xr tanh 3 , 43.Xr math 3 , 44.Sh STANDARDS 45The 46.Fn cosh 47function conforms to 48.St -ansiC . 49