Originální popis anglicky:
tanh, tanhf, tanhl - hyperbolic tangent function
Návod, kniha: Linux Programmer's Manual
#include <math.h>
double tanh(double x);
float tanhf(float x);
long double tanhl(long double x);
Link with -lm.
The
tanh() function returns the hyperbolic tangent of
x, which is
defined mathematically as sinh(x) / cosh(x).
SVID 3, POSIX, BSD 4.3, ISO 9899 (C99). The float and the long double variants
are C99 requirements.
acosh(3),
asinh(3),
atanh(3),
cosh(3),
sinh(3)
