reactos/lib/sdk/crt/math/cosh.c

   1 /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
   2 #include <math.h>
   3
   4 #ifdef _MSC_VER
   5 #pragma function(cosh)
   6 #endif
   7
   8 /*
   9  * @implemented
  10  */
  11 double cosh(double x)
  12 {
  13     const double ebig = exp(fabs(x));
  14     return (ebig + 1.0/ebig) / 2.0;
  15 }