Webum > Kids and Teens > School Time > Math > Trigonometry Activities in Math: Trigonometry Three comprehensive modules from Syvum. Each includes theory and explanation, along with practice exercises. Addition Formulas for Sines and Cosines Describes how the Sine and Cosine Addition Formulas can be derived by using vectors and how these formulas can be remembered relatively easily. An Index of Trigonometry Help Pages Provides detailed discussion of trigonometry concepts. Includes examples of varying difficulty. An Introduction to Trigonometry Definitions, basics, functions, and other concepts necessary to understand basic trigonometry. Basic Trigonometry Cosine, sine and tangent are defined. The Pythagorean theorem is illustrated as well the number of degrees in a many sided figure. Dave's Short Trig course Covers basic definitions and concepts in beginning trigonometry. Four Branches of Trigonometry Includes information on the laws of sines and cosines, right triangle trigonometry, and the ambiguous case. S.O.S. Math - Trigonometry Covers measuring degrees, equations, and formulas. Includes illustrations and related links. Sine and Other Trigonometric Functions Interactive tests and exercises. Trigonometry A brief overview of trigonometric terms and concepts. Trigonometry Introduction to trigonometry. Includes links to trig-based animations and definitions. Help build the biggest human edited directory on the internet Add your website - Open Directory Project - Become an editor