... " ;DO THI KHONG GIAN 3 CHIEU");}int X(double x, double y, double z) // doi toa do xyz sang truc X{return gr3.OX + x*gr3.UX*cos(gr3.Xx) + y*gr3.UY*cos(gr3.Xy);} int Y(double x, double ... thanhdouble g(double x, double y) // Ham g(x, y) can ve{return 5*sin(sqrt(x*x+y*y))/sqrt(x*x+y*y);}void Vehamf(){double x, y, z;double xa = -6.28, xb = 6.28;double ya = -6.28, yb = 6.28;double ... y*gr3.UY*cos(gr3.Xy);} int Y(double x, double y, double z) // doi toa do xyz sang truc Y{return gr3.OY + x*gr3.UX*sin(gr3.Xx) + y*gr3.UY*sin(gr3.Xy) − z*gr3.UZ;}double f(double x, double y) // Ham f(x, y) can...