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    Open in a new Window   » Activities in Math: Trigonometry [ Teens/Mature Teens ] - Three comprehensive modules from Syvum. Each includes theory and explanation, along with practice exercises.

    Open in a new Window   » Addition Formulas for Sines and Cosines [ Teens/Mature Teens ] - Describes how the Sine and Cosine Addition Formulas can be derived by using vectors and how these formulas can be remembered relatively easily.

    Open in a new Window   » Basic Trigonometry [ Mature Teens ] - Cosine, sine and tangent are defined. The Pythagorean theorem is illustrated as well the number of degrees in a many sided figure.

    Open in a new Window   » Dave's Short Trig course [ Teens/Mature Teens ] - Covers basic definitions and concepts in beginning trigonometry.

    Open in a new Window   » Four Branches of Trigonometry [ Mature Teens ] - Includes information on the laws of sines and cosines, right triangle trigonometry, and the ambiguous case.

    Open in a new Window   » GCSE Maths: Trigonometry [ Teens ] - Explains right triangle properties, historic background, the Pythagorean theorem, and trigonometric functions. Includes definition of terms and illustrations.

    Open in a new Window   » An Index of Trigonometry Help Pages [ Teens/Mature Teens ] - Provides detailed discussion of trigonometry concepts. Includes examples of varying difficulty.

    Open in a new Window   » An Introduction to Trigonometry [ Teens/Mature Teens ] - Definitions, basics, functions, and other concepts necessary to understand basic trigonometry.

    Open in a new Window   » Marlene's Trigonometry Calculator [ Teens/Mature Teens ] - Learn the basics, the solutions, and how to convert from degrees to radians.

    Open in a new Window   » Sine and Other Trigonometric Functions [ Mature Teens ] - Interactive tests and exercises.

    Open in a new Window   » S.O.S. Math - Trigonometry [ Mature Teens ] - Covers measuring degrees, equations, and formulas. Includes illustrations and related links.

    Open in a new Window   » Trigonometry [ Teens/Mature Teens ] - Introduction to trigonometry. Includes links to trig-based animations and definitions.



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