These five units are specifically tailored to foster the mastery of a few selected trigonometry topics that comprise the one credit MA-121 Elementary Trigonometry course. Each unit introduces the topic, provides space for practice, but more importantly, provides opportunities for students to reflect on the work in order to deepen their conceptual understanding.
These units have also been assigned to students of other courses such as pre-calculus and calculus as a review of trigonometric basics essential to those courses. This is the second edition of the materials. Units 4 and 5 have been edited to reflect suggestions from instructors who have used the materials. We have also added answers to the odd numbered practice exercises.
We are grateful for the support we received from the Open Educational Research (OER) initiative of the City University of New York (CUNY). This second edition was part of the OER Workshop-Cohort III
