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. Learn how to use the trigonometric identities to solve problems. Students are introduced to the most common trig identities and shown how to use these identities to prove that a relation is valid. Numerous problems are introduced and worked in order to build skills in these areas. Teachers User Instruction & Resource Guide - Includes Recommended books & Trigonometry Websites.