Manual page for HYPERBOLIC(3M)
sinh, cosh, tanh, asinh, acosh, atanh - hyperbolic functions
SYNOPSIS
#include <math.h>
double sinh(x)
double x;
double cosh(x)
double x;
double tanh(x)
double x;
double asinh(x)
double x;
double acosh(x)
double x;
double atanh(x)
double x;
DESCRIPTION
These functions compute the designated direct and inverse hyperbolic
functions for real arguments.
They inherit much of their roundoff error from
expm1()
and
log1p,
described in
exp.3m
DIAGNOSTICS
These functions handle exceptional arguments in the spirit of
ANSI/IEEE
Std 754-1985. Thus
sinh()
and
cosh()
return ±\(if on overflow,
acosh()
returns a NaN if its argument is less than 1, and
atanh()
returns a NaN if its argument has absolute
value greater than 1.
In addition,
sinh,cosh,
and
tanh()
may also set
errno
and call
matherr.3m
SEE ALSO
exp.3m
matherr.3m
Created by unroff & hp-tools.
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Last modified 11/5/97