Precalculus 5.1 Using Fundamental Identities

This lessons introduces the strategies that will be used to "prove" identities in trigonometry in alignment with Larson's Precalculus. It has plenty of examples and worked-out practice problems. #Shaffer, #Precalculus, #Larson, #identities, #trigonometry, #examples, #problems, #tutor, #tutorial, #free, #homeschool