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Products of Sines and Cosines

by Steven Galovich

Award: Carl B. Allendoerfer

Year of Award: 1988

Publication Information: Mathematics Magazine, Vol. 60 (1987), pp. 105-113

Summary: Algebraic number theory is used to explain several trigonometric identities of Usiskin.

Link to Article

About the Author (from Lake Forest College, 2006): Steven Galovich, received his BA and BS degrees from the University of California-Davis and a Ph.D. from Brown. He specialized in number theory and was known for his excellent writing and his advocacy for writing in mathematics.  He taught for twenty years at Carleton College and twelve years at Lake Forest College where he was also Provost and Dean of Faculty.  He passed away on December 14, 2006.


Subject classification(s): Geometry and Topology | Algebraic Geometry | Trigonometry
Publication Date: 
Wednesday, January 31, 2007