tanh(3M) Mathematical Library Functions tanh(3M)
NAME
tanh, tanhf, tanhl - hyperbolic tangent function
SYNOPSIS
c99 [ flag... ] file... -lm [ library... ]
#include <math.h>
double tanh(double x);
float tanhf(float x);
long double tanhl(long double x);
DESCRIPTION
These functions compute the hyperbolic tangent of their argument x.
RETURN VALUES
Upon successful completion, these functions return the hyperbolic tangent of x.
If x is NaN, a NaN is returned.
If x is +-0, x is returned.
If x is +-Inf, +-1 is returned.
ERRORS
No errors are defined.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
atanh(3M), isnan(3M), math.h(3HEAD), tan(3M), attributes(5), standards(5)
SunOS 5.11 12 Jul 2006 tanh(3M)
