- #include <iostream> 
- #include <cmath> 
- #include <iomanip> 
- using namespace std; 
-   
- int main() { 
- 	// your code goes here 
- 	double a, b, h; 
- 	cin >> a >> b>> h; 
- 	for(double x = a; x <= b; x += h){ 
- 		cout << fixed << setprecision(3) <<x<< " " << 3 * sin(x) << endl;	 
- 	} 
- 	return 0; 
- } 
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