This is the eleventh in a series of major trigonometry topics, adapted from a series of lessons that I wrote for homeschoolers. It is a very organized and focused topic for the use of vectors in trigonometry. There is much more on vectors in textbooks that is not used in this course. One idea builds to another as only concepts of vectors related to trigonometry are explained (This sets up the lesson without wading through the textbook). This is content for 2 lessons, depending on time available. Examples and problem solutions are step-by-step. Download the preview for suggestions and complete content for this product.