#include <iostream>
#include <cmath>
 
using namespace std;
 
int main() {
    double v0, theta_deg, g = 9.8;
 
    cout << "Masukkan kecepatan awal (m/s): ";
    cin >> v0;
 
    cout << "Masukkan sudut elevasi (derajat): ";
    cin >> theta_deg;
 
    // Konversi sudut dari derajat ke radian
    double theta_rad = theta_deg * M_PI / 180.0;
 
    // Hitung waktu total terbang
    double waktu_total = (2 * v0 * sin(theta_rad)) / g;
 
    cout << "Waktu untuk mencapai jarak horizontal terjauh adalah: " << waktu_total << " detik" << endl;
 
    return 0;
}
 

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