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Math Notes
Trig Identities II -- Double Angle
Identities
Introduction
Worked Examples
Problem Solving Tips
Additional Problems with Answers
Links to Outside Sources
Double-Angle Formulas -- From MathWorld
Trigonometric Identities
Double and Half-Angle Identities
Algebra
II: Trigonometric Identities - Math for Morons Like Us
Trigonometric Identities Equations - Trigonometry - EquationSheet
Trigonometric identity - Wikipedia
Links to Supporting Topics
Trig Identities I -- Basic Identities
Trig Identities III -- Half-Angle Identities
Trig Identities IV -- Other Identities
Trig Identities V -- Solving Equations and
Simplifying Expressions
Trig Identities VI -- Word Problems
History
History
Trigonometry
History of
Mathematics - Beginnings of Trigonometry
The birth of
trigonometry
History of Trigonometry
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