GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
CentOS 5.1 |
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atanhf(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);
Link with −lm.
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, atanh() returns not-a-number (NaN) and errno is set.
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EDOM |
x is out of range. |
SVr4, POSIX.1-2001, 4.3BSD, C89. The float and long double variants are C99 requirements.
acosh(3), asinh(3), catanh(3), cosh(3), sinh(3), tanh(3)
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atanhf(3) | |