#include <iostream>
#include <cmath>

using namespace std;

int main() {
  //saisi des parametres
  double x;
  cout << "Entrez l'anlge (en radians) : ";
  cin >> x;
  double h;
  cout << "Entrez h = ";   
  cin >> h;
  
  cout << "\nsin(x) = " << sin(x) << endl;
  cout << "derivee dsin(x)/dx = " << cos(x) << endl;
  cout << "difference finie a droite : "
       << (sin(x+h)-sin(x))/h << endl;
  cout << "difference finie a gauche : "
       << (sin(x)-sin(x-h))/h << endl;
  cout << "difference finie centrale : "
       << (sin(x+h)-sin(x-h))/(2.*h) << endl;
  
  cout << "\ncos(x) = " << cos(x) << endl;
  cout << "derivee dcos(x)/dx = " << -sin(x) << endl;
  cout << "difference finie a droite : "
       << (cos(x+h)-cos(x))/h << endl;
  cout << "difference finie a gauche : "
       << (cos(x)-cos(x-h))/h << endl;
  cout << "difference finie centrale : "
       << (cos(x+h)-cos(x-h))/(2.*h) << endl;

  return 0;
}