#include <iostream>
#include <iomanip>
#include <cmath>
 
using namespace std;
 
const double pi = 3.1415926;
 
double NCos(int n)
{
    static const double s2 = 1/sqrt(2);
    double res = (n%2 == 1) ? s2 : (n%4 == 0) ? 1 : 0;
    if (n%8 >= 3 && n%8 <= 5) res *= -1;
    return res;
}
 
double summa(double x, double eps = 1e-7) {
    double sum = 1, term = 1;
 
    for (int n = 1; abs(term) > eps; ++n)
        sum  = sum + (term*=x/n) * NCos(n);
 
    return sum;
    }
 
int main() {
    for (double x = 0.1; x < 1.05; x += 0.1) {
        cout
                << setprecision(3) << left << setw(4) << x
                << setprecision(7) << left << setw(10) << summa(x)
                << setprecision(7) << left << setw(10)
                << exp(x * cos(pi / 4))*cos(x * sin(pi / 4)) << endl;
        }
    }
 

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