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103.18 Trigonometric addition and subtraction formulas, a unified visual approach

Published online by Cambridge University Press:  06 June 2019

David Gau
David Gau*
Affiliation:
Department of Math. and Stat., California State University, Long Beach, CA, 90630, USA e-mail: [email protected]
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Information
The Mathematical Gazette , Volume 103 , Issue 557 , July 2019 , pp. 314 - 315
Copyright
© Mathematical Association 2019 

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References

Roger, Nelsen, Proofs without words II, more exercises in visual thinking, The Mathematical Association of America (2000).Google Scholar
Eric, W. Weisstein, Trigonometric addition formulas. http://mathworld.wolfram.com/TrigonometricAdditionFormulas.htmlGoogle Scholar
Derek, Colwell and Jack, Gillett, The addition formula for sine. A compilation of methods, Math. Gaz. 73 (Oct.1989) pp. 197-206.Google Scholar