Complementary courses are those in domains outside of your program. For example, students in the Science Program cannot take science or math courses as complementary courses. But they may take courses in the Social Sciences, Languages, the Creative Arts and Literature and the Business area.
There are courses that are complementary for all programs. These are
There are many other courses that are offered in a domain (area) of study outside of your program. They will be shown to you when you make your course selection, as long as you have the preqrequisites. If you are unsure about what the prerequisites for a course are, ask your academic advisor.