FERNANDES, Cícera; SILVA, José Gleison Alves da; SOUSA, Rosalide Carvalho de; VASCONCELOS, Ana Karine Portela. Practical resolution tips for trigonometric ratios with remarkable angles. Research, Society and Development, [S. l.], v. 9, n. 1, p. e09911337, 2020. DOI: 10.33448/rsd-v9i1.1337. Disponível em: https://ojs34.rsdjournal.org/index.php/rsd/article/view/1337. Acesso em: 16 jul. 2025.