#include <iostream>
#include <cmath>
using namespace std;
int main() {
double v, g = 9.8;
cout << "Masukkan kecepatan awal (m/s): ";
cin >> v;
// Sudut optimal 45 derajat -> sin(90) = 1
double Rmax = (v * v) / g;
cout << "Jarak horizontal terjauh = " << Rmax << " meter" << endl;
return 0;
}
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