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On a Common Mnemonic from Trigonometry

by Eugene C. Boman (Penn State University, DuBois Campus) and Richard Brazier (Penn State University, DuBois Campus)

This article originally appeared in:
College Mathematics Journal
September, 2004

Subject classification(s): Geometry and Topology | Trigonometry | Trigonometric Functions
Applicable Course(s): 2.2 Trigonometry

A picture is used to explain why a mnemonic for memorizing the sines of familiar angles works.


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