NAME

tanh, tanhf, tanhl — hyperbolic tangent functions

SYNOPSIS

Math Library (libm, -lm)
#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.