Etymology of 'sine'. The Arabic 'jayb' and 'jiba' derive from the Sanskrit 'jivā' ... but why not from the more common Sanskrit 'jyā'?
History of trigonometric tables including Lambert's Algebraische Formeln für die Sinus von drei zu drei Graden
Where could I find the reference for the statement of Euler finding out the coefficients of Fourier series?
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