SANJANA, K. J. On Equations for determining cosπ/ (2n+1). The Journal of the Indian Mathematical Society, [S. l.], v. 3, n. 2, p. 72–74, 1911. DOI: 10.18311/jims/1911/17816. Disponível em: http://www.informaticsjournals.com/index.php/jims/article/view/17816. Acesso em: 19 may. 2024.