why х does it matter inf?

Question

#include<iostream>
#include<math.h>
#include<stdlib.h>
#include<conio.h>
using namespace std;
int main()
{
double x,y,a,Q;
cout<<"vvedite a=";
cin>>a;
x=4*exp(-sin(y))+pow((1/tan(y/2)),2);
cout<<"x="<<x<<endl;
y=-8*exp(-3*a+1);
cout<<"y="<<y<<endl;
Q=2/5*pow(tan(0.1*x-2),2)-pow(3,tan(x));
cout<<"Q="<<Q;
getch();
}

Answer 1

Clarify your question.