Aryabhata · Mathematics
Aryabhata’s table of sine-differences - the first true sine table in history - and the strange journey of his word <em>jya</em>, the half-chord, which travelled through Arabic mistransliteration to become the ‘sine’ every student now learns.
You learned that Aryabhata replaced the Greek full-chord with the half -chord ( jya ), built the first table of sine-differences at intervals across a quarter-circle, and that jya became Arabic jiba , misread as jaib (‘bay, fold’), then Latin sinus , then ‘sine.’ Explain the mathematics and the…
Leads to Muhammad ibn Musa al-Khwarizmi.
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