NAME
tanh, tanhf,
tanhl —
hyperbolic tangent functions
SYNOPSIS
#include
<math.h>
double
tanh(double
x);
float
tanhf(float
x);
long double
tanhl(long
double x);
DESCRIPTION
The
tanh()
function computes the hyperbolic tangent of x. The
tanhf()
function is a single precision version of tanh().
The
tanhl()
function is an extended precision version of
tanh().
RETURN VALUES
The tanh(),
tanhf(), and tanhl()
functions return the hyperbolic tangent value.
SEE ALSO
acos(3), asin(3), atan(3), atan2(3), cos(3), cosh(3), sin(3), sinh(3), tan(3)
STANDARDS
The tanh() function conforms to
ANSI X3.159-1989
(“ANSI C89”).
HISTORY
The tanh() function first appeared in
Version 7 AT&T UNIX.