A Combinatorial Proof of the Pythagorean Theorem

by Edward R. Scheinerman (John Hopkins University)

Mathematics Magazine
February, 1995

Subject classification(s): Series
Applicable Course(s): 3.6 Differential Equations

The article gives a combinatorial proof of $\sin^2 x + \cos^2 x = 1$.

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.