A geometric proof of the addition identity for sine

John M. Alongi

doi:10.1080/10511970508984107

A geometric proof of the addition identity for sine

John M. Alongi^*

^*Corresponding author for this work

Mathematics

Research output: Contribution to journal › Article › peer-review

Abstract

We provide a geometric proof of the formula for the sine of the sum of two positive angles whose measures sum to less than π/2.

Original language	English (US)
Pages (from-to)	81-85
Number of pages	5
Journal	PRIMUS
Volume	15
Issue number	1
DOIs	https://doi.org/10.1080/10511970508984107
State	Published - Mar 2005

Keywords

Addition identity
Derivative
Trigonometric function

ASJC Scopus subject areas

Mathematics(all)
Education

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10.1080/10511970508984107

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title = "A geometric proof of the addition identity for sine",

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A geometric proof of the addition identity for sine

Abstract

Keywords

ASJC Scopus subject areas

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