Inc. BarCharts 
Trigonometry [PDF ebook] 

Strengthen your trig skills and grades with this powerful and simple tool for reviewing and referencing the most important core concepts. Quickly find that answer you need in this 6 pagee Guide reference rather than flipping through a large book. Used in the fields of engineering, medical imaging, geography, land surveying, and video game development to name a few, you may find that trig is here to stay in your career life. Keep this tool by your side and through it all for that extra memory jolt when you need it.Topics covered include:Right Triangles Right Triangle Trigonometry Applications of Trigonometric Ratios Oblique Triangles Circles Trigonometry with the Unit Circle Graphing Trigonometric Functions Solving Trigonometric Equations Trigonometric Identities & Formulas Suggested uses:Quick Reference instead of digging into a large book to find a core answer you need while studying, use the guide to reinforce quickly and repeatedly Memory refreshing your memory repeatedly is a foundation of studying, have the core labs handy so you can focus on the larger picture