Power-Programmierung/CD2.mdf/gnu/djgpp/libsrc/m/src/tanh.c

C/C++ Source or Header | 1993-05-31 | 163 b | 10 lines

#include <math.h>

double tanh(double x)
{
  const double ebig = exp(x);
  const double esmall = 1.0/ebig;
  return (ebig - esmall) / (ebig + esmall);
}