ALGORABI, M. S.; SHARAF, M. Fourier Series Expansions of Powers of the Trigonometric Sine and Cosine Functions. JOURNAL OF ADVANCES IN MATHEMATICS, [S. l.], v. 12, n. 5, p. 6248–6253, 2016. DOI: 10.24297/jam.v12i5.246. Disponível em: https://rajpub.com/index.php/jam/article/view/246. Acesso em: 14 may. 2024.