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.
Sine and Other Trigonometric Functions
Interactive tests and exercises.
Trigonometry
Introduction to trigonometry. Includes links to trig-based animations and definitions.
Four Branches of Trigonometry
Includes information on the laws of sines and cosines, right triangle trigonometry, and the ambiguous case.
GCSE Maths: Trigonometry
Explains right triangle properties, historic background, the Pythagorean theorem, and trigonometric functions. Includes definition of terms and illustrations.
An Index of Trigonometry Help Pages
Provides detailed discussion of trigonometry concepts. Includes examples of varying difficulty.
Marlene's Trigonometry Calculator
Learn the basics, the solutions, and how to convert from degrees to radians.
An Introduction to Trigonometry
Definitions, basics, functions, and other concepts necessary to understand basic trigonometry.
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.
S.O.S. Math - Trigonometry
Covers measuring degrees, equations, and formulas. Includes illustrations and related links.
Activities in Math: Trigonometry
Three comprehensive modules from Syvum. Each includes theory and explanation, along with practice exercises.
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