#include <cmath>
#include <iostream>
#include <iomanip>

int main()
{
  const auto pi = std::acos(-1.0);
  std::cout << "#      x sin(x)\n";	

  for (auto x : {0.0, pi/6, pi/4, pi/3, pi/2})
  {
    std::cout << std::setw(8) << x << " " << std::sin(x) << '\n';
  }
}