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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
    21 KB (2,844 words) - 16:26, 18 May 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