#include <iostream>
int main()
{
const double x = 1.82;
const double y = 18.25;
double b, z;
z = (sqrt(15 * y)) / (y + (1./tan(x)));
b = (y - z / (y - x)) / (cos(x) + ((y - x)/ 2));
std::cout << b;
return 0;
}
#include <iostream>
int main()
{
const double x = 1.82;
const double y = 18.25;
double b, z;
z = (sqrt(15 * y)) / (y + (1./tan(x)));
b = (y - z / (y - x)) / (cos(x) + ((y - x)/ 2));
std::cout << b;
return 0;
}