#include <stdio.h>
#include <stdlib.h>
#include <math.h>

#define e 2.73
#define E 0.000001

double F(double x);
double S(double x);
double ch(double x);

int main(void)
{
  printf(" x \t|\t  S(x)\n");

  for(double x = 0; x < 5.5; x += 0.5)
  {
    double value = S(x);
    printf("%.1lf\t|\t%.5lf\n", x, value);
  }

  system("pause");
  return 0;
}

double F(double x)
{
  double x_k = 2 * x; double sum = x_k; int k = 2;

  while(fabs(x_k) > E)
  {
    x_k = x_k * (pow(-1, k) * pow(x, 2)) / (k * (2*k + 1));
    sum += k; k++;
  }

  return sum;
}

double ch(double x)
{
  return (pow(e, x) + pow(e, -x)) / 2;
}

double S(double x)
{
  return F(x) - sin(x) * ch(x);
}