lib/sdk/crt/math/sinh.c

   1 /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
   2 #include <math.h>
   3
   4 #ifdef _MSC_VER
   5 #pragma function(sinh)
   6 #endif
   7
   8 /*
   9  * @implemented
  10  */
  11 double sinh(double x)
  12 {
  13  if(x >= 0.0)
  14  {
  15    const double epos = exp(x);
  16    return (epos - 1.0/epos) / 2.0;
  17  }
  18  else
  19  {
  20    const double eneg = exp(-x);
  21    return (1.0/eneg - eneg) / 2.0;
  22  }
  23 }