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=Etymology of Sine= |
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* [http://www-gap.dcs.st-and.ac.uk/~history/HistTopics/Trigonometric_functions.html Trigonometric functions] (''MacTutor History of Mathematics Archive'')
* Amartya Sen, "[http://www1.timesofindia.indiatimes.com/articleshow/33808779.cms Not Frog, But Falcon]", ''The Times of India'' (Jan. 9, 2003).
* Prof. L. A. Smoller, [http://www.ualr.edu/~lasmoller/trig.html The birth of trigonometry]
Maor attributes the ''sinus'' translation to Gherardo of Cremona (c. 1150) instead of Robert of Chester (although he doesn't explicitly say Gherardo was "first"). Boyer, however, describes how both Robert of Chester and Gherardo of Cremona, along with several others, were contemporaries who were gathered together in Toledo by the archbishop there, where a school of translation was developed. Boyer says that Robert made the first translation of e.g. the Koran and of al-Khwarizmi's ''Algebra'', among other things. Boyer also says, however, that most of these works are not dated, so it is possible that there is some uncertainty over who first translated the trigonometric work.
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