“Six Functions Come of Age.” Trigonometric Delights, by Eli Maor, Princeton University Press, PRINCETON; OXFORD, 1998, pp. 35–40, www.jstor.org/stable/j.ctt1r2f46.10. Accessed 25 Jan. 2021.
Maor, E. (1998). Six Functions Come of Age. In Trigonometric Delights (pp. 35-40). PRINCETON; OXFORD: Princeton University Press. Retrieved January 25, 2021, from http://www.jstor.org/stable/j.ctt1r2f46.10
Maor, Eli. "Six Functions Come of Age." In Trigonometric Delights, 35-40. PRINCETON; OXFORD: Princeton University Press, 1998. Accessed January 25, 2021. http://www.jstor.org/stable/j.ctt1r2f46.10.
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