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The addition formula for sine: A compilation of methods

Published online by Cambridge University Press:  01 August 2016

Derek Colwell  and
Jack Gillett
Derek Colwell
Affiliation:
Department of Mathematics, Staffordshire Polytechnic, Beaconside, Stafford ST18 2AD
Jack Gillett
Affiliation:
Department of Mathematics, Staffordshire Polytechnic, Beaconside, Stafford ST18 2AD
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Extract

Over the years we have come across many different methods of proving the sine function addition formula

and we have long felt it could be both interesting and useful to gather together in one article a list of methods to illustrate how different ideas from geometry, algebra and calculus may be used to prove it.

Type
Research Article
Information
The Mathematical Gazette , Volume 73 , Issue 465 , October 1989 , pp. 197 - 206
Copyright
Copyright © The Mathematical Association 1989

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