class 9/10 er valoi kothin wala piece of cake

#include<bits/stdc++.h>
using namespace std;
int main()
{
    double x, y,z;
int t,i;
cin>>t;
for(i=1;i<=t;i++)
{
    double sum=0;

   cin>>x>>y>>z;
   double cosa = cos(z * acos(-1) / 180.0)*2*x*y;
   //cout<<cos(z)<<endl;
   double b = sqrt((pow(x,2)+pow(y,2))-cosa);

   double ac = sqrt(2*((y*y)+(b*b))-(x*x));
  sum = x*x + ac*ac;
  printf("%.9lf\n",sum);

}
}