#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;

const double eps = 1e-6;


signed main()
{
    double a,b,h;
    a = 0, b = 3, h = 0.3;

    for (double x = a; x<=b; x+=h)
    {
        double sign = 1;
        double chisl = 1;
        double znam = 1;
        double i = 1;
        double sum= 0;
        double cnt = 0;
        do
        {
            cnt = sign*chisl/znam;
            sum+=cnt;

            znam *=i*i;
            i++;
            chisl*=x*x/4;
            sign *=-1;
        }
        while (fabs(cnt)>=eps);

        cout << fixed << setprecision(6) << x<< " "<< sum << endl;
    }

}