#include <iostream>
#include <cmath>
using namespace std;
 
int main() {
    double sudut, kecepatanAwal, gravitasi = 10.0;
    cout << "Masukkan sudut peluncuran (derajat): ";
    cin >> sudut;
    cout << "Masukkan kecepatan awal: ";
    cin >> kecepatanAwal;
 
    double sudutRadian = sudut * M_PI / 180.0;
    double waktu = (2 * kecepatanAwal * sin(sudutRadian)) / gravitasi;
 
    cout << "Waktu yang diperlukan: " << waktu << endl;
 
    return 0;
}
 

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