Elementary proofs of the identities , and

Autores: Tuo-Yeong Lee, Yuxuan Xiong
Localización: International journal of mathematical education in science and technology, ISSN 0020-739X, Vol. 45, Nº. 7, 2014, págs. 1108-1113
Idioma: inglés
DOI: 10.1080/0020739x.2014.904528
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Resumen
- We use a trigonometric identity and elementary calculus to obtain simple proofs of the following identities: and .