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#include <iostream> using namespace std; struct Point{ int x, y; }point; char sign_sin(Point p){ if(p.y>0){ return '+'; }else{ return '-'; } } char sign_cos(Point p){ if(p.x>0){ return '+'; }else{ return '-'; } } char sign_tan(Point p){ if(p.x>0 && p.y>0 || p.x<0 && p.y<0){ return '+'; }else{ return '-'; } } int main(){ int x, y; while(cin >> x >> y){ if(x==0 || y==0){ cout << "Invalid point! either x or y located in their axis. Enter a new point : " << endl; continue; } point.x = x; point.y = y; cout << "sin " << sign_sin(point) << endl; cout << "cos " << sign_cos(point) << endl; cout << "tan " << sign_tan(point) << endl; } return 0; }
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