TANH(3M) Mathematical Library Functions TANH(3M)

tanh, tanhf, tanhl - hyperbolic tangent function

c99 [ flag... ] file... -lm [ library... ]
#include <math.h>
double tanh(double x);

float tanhf(float x);

long double tanhl(long double x);

These functions compute the hyperbolic tangent of their argument x.

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.

No errors are defined.

See attributes(7) for descriptions of the following attributes:

Interface Stability Standard
MT-Level MT-Safe

math.h(3HEAD), atanh(3M), isnan(3M), tan(3M), attributes(7), standards(7)

July 12, 2006 SunOS 5.11