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Ganita Bharati

Published in Association with Bulletin of The Indian Society for History of Mathematics

Current Volume: 45 (2023 )

ISSN: 0970-0307

Periodicity: Half-Yearly

Month(s) of Publication: June & December

Subject: Mathematics

DOI: https://doi.org/10.32381/GB

Online Access is Free for Life Member

250

An Indian Version of al-Kashi’s Method of Iterative Approximation of sin 1

By : Kim Plofker

Page No: 95-106

Abstract
The well-known “feedback loop” of trigonometry of sines, from its origin in Indian astronomy to the Islamic world in the first millennium CE and back to India in the mid-second, includes many interesting and under-studied developments. This paper examines a Sanskrit adaptation and refinement of a medieval method foRsine approximation, apparently from the court of Jai Singh in the early 18th century.
 

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