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Proof Without Words: The Triple Angle Sine and Cosine Formulas - MaRDI portal

Proof Without Words: The Triple Angle Sine and Cosine Formulas

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Publication:2911539

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DOI10.4169/math.mag.85.1.43zbMath1246.97008OpenAlexW158777658MaRDI QIDQ2911539

Roger B. Nelsen, Claudi Alsina

Publication date: 31 August 2012

Published in: Mathematics Magazine (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.4169/math.mag.85.1.43

zbMATH Keywords

cosine formula sine formula triple angle

Mathematics Subject Classification ID

Descriptive geometry (educational aspects) (97G80)

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