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arXiv math-ph/9812019math-phmath.MGmath.MPmath.NT
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平方三角函数有理的角

On Angles Whose Squared Trigonometric Functions are Rational

John H. Conway, Charles Radin, Lorenzo Sadun

摘要:

我们考虑实数之间的有理线性关系,其平方三角函数具有有理值,我们称之为“测地”角。我们构造了一个方便的基础上的向量空间Q产生的这些角度。大地角和合理的线性组合的大地角自然出现在欧几里德几何,为说明我们将我们的结果,以equidecomposability多面体。

英文摘要:

We consider the rational linear relations between real numbers whose squared trigonometric functions have rational values, angles we call ``geodetic''. We construct a convenient basis for the vector space over Q generated by these angles. Geodetic angles and rational linear combinations of geodetic angles appear naturally in Euclidean geometry; for illustration we apply our results to equidecomposability of polyhedra.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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