These free and open educational resources are designed to meet the needs of students taking College Algebra II with Trigonometry or PreCalculus courses. They also give a great introduction to Trigonometry for the student who has never taken a Trigonometry course before. Two OERs are presented here: 1. PreCalculus by Jay Abramson, licensed under CC BY 2. Trigonometry by Mike Weimerskirch - a video textbook consisting of pre-recorded videos. This resource is licensed under CC BY-NC.
