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Manpages ATANHSection: Linux Programmer's Manual (3 )Updated: 1993-06-13 Index Return to Main Contents NAMEatanh - inverse hyperbolic tangent functionSYNOPSIS#include <math.h> double atanh(double x); DESCRIPTIONThe 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.ERRORS
CONFORMING TOSVID 3, POSIX, BSD 4.3, ISO 9899SEE ALSOasinh(3), acosh(3), cosh(3), sinh(3), tanh(3)
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