// adaptado de Barton,Nackman "Scientific and Engineering C++"
//      jtmn, Ago, 2003
 

// Read an angle in degrees and print its cosine.
#include <iostream>
#include <cmath>
using namespace std;
int main() {

    float angle;
    cout << "entre com angulo em graus " << endl;  
    cin >> angle;
    cout << "angle = "<< angle <<"   cos(angle)= "<< cos(angle * M_PI / 180.0 )
         << endl;   // M_PI is from <math>
    return 0;
}