sinh.3m

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· 3M 代码 · 共 47 行

.\" SCCSID: @(#)sinh.3m	6.2	8/30/89
.TH sinh 3m VAX
.SH Name
sinh, cosh, tanh \- hyperbolic functions
.SH Syntax
.nf
.B #include <math.h>
.PP
.B double sinh(\fIx\fP)
.PP
.B double cosh(\fIx\fP)
.B double \fIx\fP;
.PP
.B double tanh(\fIx\fP)
.B double \fIx\fP;
.fi
.SH Description
These functions compute the designated hyperbolic 
functions for real arguments.
.SH Return Values
The
.PN sinh
and
.PN cosh
functions return HUGE_VAL and set
.I errno
to ERANGE when the correct value would overflow.
.SH Environment
When your program is compiled using the System V environment,
.PN sinh
and 
.PN cosh
.NXR "sinh subroutine (math)"
.NXR "cosh subroutine (math)"
.NXR "tanh subroutine (math)"
.NXR "hyperbolic function"
return HUGE (and
.PN sinh
may return HUGE or negative
.I x
) when the correct value would overflow and set 
.I errno
to ERANGE.
.PP
These error-handling procedures may be changed with the function
.MS matherr 3m .