This series covers essential subjects in Trigonometry and Pre-Calculus with exceptional clarity so that students will feel well prepared to move onto Calculus and Physics. What sets this series apart from other Trigonometry teaching tools is that the concepts are taught entirely through step-by-step example problems of increasing difficulty. It works by introducing each new concept in an easy to understand way and using example problems that are worked out step-by-step and line-by-line to completion. This lesson teaches how to graph relations that involve the trig functions. Students are introduced to the graphs of the basic trig functions which form the basis for more complicated graphs. Numerous examples provide the foundation for the concepts and allow students to practice these skills. Teachers User Instruction & Resource Guide - Includes Recommended books & Trigonometry Websites.