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
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.