Originální popis anglicky:
cosh, coshf, coshl - hyperbolic cosine function
Návod, kniha: Linux Programmer's Manual
#include <math.h>
double cosh(double x);
float coshf(float x);
long double coshl(long double x);
Link with -lm.
The
cosh() function returns the hyperbolic cosine of
x, which is
defined mathematically as (exp(x) + exp(-x)) / 2.
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),
sinh(3),
tanh(3)
