This lesson, 1 day in review, 3 - 4 days for initial instruction, is a careful treatment of the properties of sine, cosine and tangent. The intent of the lesson is that students come away with a solid understanding of what the features and components of the basic trigonometric functions are, but also and more importantly, where those features come from.The hope is that by establishing a solid understanding of the basic concepts, students will be able to move more quickly through the application