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particulars, Vieta had found how to express sin nθ (n a positive integer) as a polynomial in sin θ, cos θ. He saw at once that the formidable equation of his rival
17 KB (2,319 words) - 05:40, 20 February 2016
somewhere cross the x-axis. A similar argument guarantees that any odd-degree polynomial equation has at least one real solution. ...It was the precise formula
36 KB (5,182 words) - 19:54, 18 January 2016