NAME
tanh,
tanhf
- hyperbolic tangent function
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
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 C89'') .