半正矢公式 (Chinese Wikipedia)

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Korn, Grandino Arthur; Korn, Theresa M. Appendix B: B9. Plane and Spherical Trigonometry: Formulas Expressed in Terms of the Haversine Function. Mathematical handbook for scientists and engineers: Definitions, theorems, and formulas for reference and review 3. Mineola, New York, USA: Dover Publications, Inc. 2000: 892–893 [1922]. ISBN 978-0-486-41147-7.

van Brummelen, Glen Robert. Heavenly Mathematics: The Forgotten Art of Spherical Trigonometry. Princeton University Press. 2013 [2015-11-10]. ISBN 9780691148922. 0691148929.
Cajori, Florian. A History of Mathematical Notations 2 2 (3rd corrected printing of 1929 issue). Chicago, USA: Open court publishing company. 1952: 172 [1929] [2015-11-11]. ISBN 978-1-60206-714-1. 1602067147. The haversine first appears in the tables of logarithmic versines of José de Mendoza y Rios (Madrid, 1801, also 1805, 1809), and later in a treatise on navigation of James Inman (1821).
Inman, James. Navigation and Nautical Astronomy: For the Use of British Seamen 3. London, UK: W. Woodward, C. & J. Rivington. 1835 [1821] [2015-11-09]. （原始内容存档于2016-12-28）.