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  1. #include <cmath>
  2. #include <cstdio>
  3. using namespace std;
  4.  
  5.  
  6. int main()
  7. {
  8. 	const double pi = std::acos(-1);
  9. 	int t, r, x;
  10. 	scanf("%d", &t);
  11. 	while (t--) {
  12. 		scanf("%d%d", &r, &x);
  13. 		double a = pi * x / 180;
  14. 		printf("%.7lf\n", r*sin(a)/(sin(a)*sin(a)+cos(a)));
  15. 	}
  16. 	return 0;
  17. }
  18.  
Success #stdin #stdout 0s 16064KB
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https://ideone.com/RYkF3m
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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