“Appendix 1: Let’s Revive an Old Idea.” Trigonometric Delights, by Eli Maor, Princeton University Press, PRINCETON; OXFORD, 1998, pp. 213–217, www.jstor.org/stable/j.ctt1r2f46.29. Accessed 14 Aug. 2020.
Maor, E. (1998). Appendix 1: Let’s Revive an Old Idea. In Trigonometric Delights (pp. 213-217). PRINCETON; OXFORD: Princeton University Press. Retrieved August 14, 2020, from www.jstor.org/stable/j.ctt1r2f46.29
Maor, Eli. "Appendix 1: Let’s Revive an Old Idea." In Trigonometric Delights, 213-17. PRINCETON; OXFORD: Princeton University Press, 1998. Accessed August 14, 2020. www.jstor.org/stable/j.ctt1r2f46.29.
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