C++ Sin() Function

#include<iostream>

#include<cmath>

using namespace std;

int main()

{

    double x, y;

    cout << "Enter Angle : ";

    cin >> x;

    cout << endl;

    y = sin(x * (M_PI/180));

    cout << "Trigonometric Ratio : " << y << endl;

    return 0;

}