TANH(3)
Library Functions Manual
TANH(3)
NAME
tanh
,
tanhf
—
hyperbolic tangent function
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <
math.h
>
double
tanh
(
double x
);
float
tanhf
(
float x
);
DESCRIPTION
The
tanh
() and
tanhf
() functions compute the hyperbolic tangent of
x
. For a discussion of error due to roundoff, see
math(3)
.
RETURN VALUES
The
tanh
() function returns the hyperbolic tangent value.
SEE ALSO
acos(3)
,
asin(3)
,
atan(3)
,
atan2(3)
,
cos(3)
,
cosh(3)
,
math(3)
,
sin(3)
,
sinh(3)
,
tan(3)
STANDARDS
The
tanh
() function conforms to ANSI X3.159-1989 (“ANSI C”).
May 2, 1991
NetBSD 5.99