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sinh.c
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00001 /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */ 00002 #include <math.h> 00003 00004 #ifdef _MSC_VER 00005 #pragma function(sinh) 00006 #endif 00007 00008 /* 00009 * @implemented 00010 */ 00011 double sinh(double x) 00012 { 00013 if(x >= 0.0) 00014 { 00015 const double epos = exp(x); 00016 return (epos - 1.0/epos) / 2.0; 00017 } 00018 else 00019 { 00020 const double eneg = exp(-x); 00021 return (1.0/eneg - eneg) / 2.0; 00022 } 00023 }
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