E562 -- Quomodo sinus et cosinus angulorum multiplorum per producta exprimi queant

(On how sines and cosines of multiplied angles may be expressed by products)


Euler presents cosine as an infinite product, related to E246 and E247. Faber says this is also in the Introductio, pp. 258-283.

According to the records, it was presented to the St. Petersburg Academy on May 12, 1774.

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