kolibrios-fun/programs/develop/libraries/kolibri-libc/source/math/asinh.c

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/* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
#include <math.h>
double
asinh(double x)
{
return x>0 ? log(x + sqrt(x*x + 1)) : -log(sqrt(x*x+1)-x);
}