GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
CentOS 4.8 |
i386 |
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atanhl(3) |
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atanh, atanhf, atanhl − inverse hyperbolic tangent function
#include <math.h>
double atanh(double x);
float atanhf(float x);
long double atanhl(long double x);
The atanh() function calculates the inverse hyperbolic tangent of x; that is the value whose hyperbolic tangent is x. If the absolute value of x is greater than 1.0, acosh() returns not-a-number (NaN) and errno is set.
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EDOM |
x is out of range. |
SVID 3, POSIX, BSD 4.3, ISO 9899. The float and long double variants are C99 requirements.
asinh(3), acosh(3), cosh(3), sinh(3), tanh(3)
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atanhl(3) | |