#include <iomanip>
#include <iostream>
using namespace std;
int main() {
double xn;
double xk;
double dx;
cin >> xn >> xk >> dx;
double k = xk + dx / 10.0;
double y;
cout.setf(ios::fixed);
for (double x = xn; x < k; x += dx) {
if (x < 1.25) y = exp(-1.34 * x) / sqrt(pow(x, 2) + 1.2);
else y = sqrt(2.2 * x) + cos(2.0 * x);
cout << setprecision(2) << x << '\t'
<< setprecision(5) << y << '\n';
}
}