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'') .