If $A \subset C$ and $B \subset D$ then $(A imes B) \cup(C imes D)=$

Question

If $A \subset C$ and $B \subset D$ then $(A 	imes B) \cup(C 	imes D)=$

Professor PC Thomas Classes · Answer

$(A 	imes B) \cup(C 	imes D)=C 	imes D$ as $A 	imes B \subset C 	imes D$