DragonFly On-Line Manual Pages
TANH(3) DragonFly Library Functions Manual TANH(3)
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.
DragonFly 4.1 July 17, 2013 DragonFly 4.1