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Who Invented Sine? [Solved]
The first published use of the abbreviations sin, cos, and tan is by the 16th-century French mathematician Albert Girard; these were further promulgated by Euler (see below).
Where do Sin, Cos and Tan Actually Come From - Origins of Trigonometry - Part 1
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Origin of the Sine Function Part 1
The
Why are Sine & Cosine given their names?
… from well if and this should be a little bit familiar to you if you take the values of
