This course takes a unit circle approach to introducing trigonometry. Topics include unit circle trigonometry, right triangle trigonometry, periodic functions, trigonometric equations and identities, applications of trigonometry, and conics.

This course offers a set of resources including links to the text, videos, and online assessments.

This course is based on the open textbook, Precalculus, by David Lippman and Melonie Rasmussen.

Lumen OER courses apply learning science insights to engage students and better support the learning process. Content includes text, images, videos, assessments, directed feedback, practice questions, and other interactives that invite students to apply their knowledge and improve their understanding. Lumen’s online homework system, OHM, provides frequent practice, machine grading, and immediate feedback to help students learn and master math and other quantitative subjects.