In this lesson, Professor John Zhu gives an introduction to the 4 trigonometric identities: pythagorean, double angle, power reducing, and sum or difference. He also touches on the negative angle and the product to sum identity. The professor goes through multiple example proof problems.
*These practice questions are only helpful when you work on them offline on a piece of paper and then use the solution steps function to check your answer.
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.