This is the second in a series of major trigonometry topics, adapted from a series of lessons that I wrote for homeschoolers. It builds from Right Triangle Trigonometry. It starts with discussion of degree and radian measure and then introduces the circular functions, how we get them, and how to use them. Reference angles are discussed in detail. My product "Special Angle Chart" is included in this product as a wrap-up to a lot of ideas. There are a lot of diagrams and problems, both as examples and to assign. This can be 4 or 5 lessons. Download the preview to see suggestions and complete content for this product.