Trigonometric functions have always been an important question types in NCEE math test, as well as a hot one, and the questions appear in various forms. Its difficulty is mainly reflected in the flexible formula transformation form, which examines the students' comprehensive ability. In the multiple‐choice questions, fill‐in‐the‐blank questions are usually the finale. So in order to make the students learn to master this kind of problem better, we summarize the trigonometric function problems in the NCEE math test.