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  1. #include <iostream>
  2. #include <math.h>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	int n;
  7. 	double x, p = 1;
  8. 	double cs, sc;
  9. 	cin >> x;
  10. 	cin >> n;
  11. 	cs = cos(fabs(x));
  12. 	sc = cos(fabs(x));
  13. 	for(int k = 1; k <=n; k++)
  14. 	{
  15. 		p*= (k / (k + 1)) - cs;
  16. 		cs*=sc;
  17. 	}
  18. 	cout << p << endl;
  19. 	return 0;
  20. }
Success #stdin #stdout 0s 3432KB
comments (?)
stdin 
50
16
stdout 
0.00782772
https://ideone.com/qHbwaQ
А116д
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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