GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
CentOS 5.1 |
|
 |
acosh(3) |
 |
acosh, acoshf, acoshl − inverse hyperbolic cosine function
#include <math.h>
double
acosh(double x);
float acoshf(float x);
long double acoshl(long double x);
Link with −lm.
The acosh() function calculates the inverse hyperbolic cosine of x; that is the value whose hyperbolic cosine is x. If x is less than 1.0, acosh() returns not-a-number (NaN) and errno is set.
|
EDOM |
x is out of range. |
SVr4, POSIX.1-2001, 4.3BSD, C89. The float and long double variants are C99 requirements.
asinh(3), atanh(3), cacosh(3), cosh(3), sinh(3), tanh(3)
|
acosh(3) | |