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- W4200469786 abstract "We present a plane trigonometric proof for the case n = 4 of Fermat’s Last Theorem. We first show that every triplet of positive real numbers (a, b, c) satisfying a4 + b4 = c4 forms the sides of an acute triangle. The subsequent proof is founded upon the observation that the Pythagorean description of every such triangle expressed through the law of cosines must exactly equal the description of the triangle from the Fermat equation. On the basis of a geometric construction motivated by this observation, we derive a class of polynomials, the roots of which are the sides of these triangles. We show that the polynomials for a given triangle cannot all have rational roots. To the best of our knowledge, the approach offers new geometric and algebraic insight into the irrationality of the roots." @default.
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- W4200469786 date "2021-12-01" @default.
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- W4200469786 title "A plane trigonometric proof for the case n = 4 of Fermat’s Last Theorem" @default.
- W4200469786 doi "https://doi.org/10.7546/nntdm.2021.27.4.154-163" @default.
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