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Sharing Teaching Ideas
Sharing Teaching Ideas: Cos_ x + Sin_ x and the Trigonometric Sum and Difference Identities

Marsha Hurwitz 

October 2002, Volume 95, Issue 7, Page 510

Abstract:
Activities that help students conjecture the trigonometric sum and difference formulas. Each activity begins as a variation of the trigonometric identity cos_x + sin_x.

Keywords:
Article
Calculators
Conceptual Development
Grades 9-12
Trig Identities
Teacher
Lesson Plans
Reasoning and Proof
Representation