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Revisited: \( tan{1}+tan{2}+tan{3} = \pi \)

by Michael Ecker

This article originally appeared in:
College Mathematics Journal
May, 2006

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

This capsule  demonstrates the validity of a trigonometric identity by paper folding.

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