# Revisited: $tan{1}+tan{2}+tan{3} = \pi$

by Michael Ecker

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.

A pdf copy of the article can be viewed by clicking below. Since the copy is a faithful reproduction of the actual journal pages, the article may not begin at the top of the first page.