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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Kepler–Bouwkamp constant ： ウィキペディア英語版 Kepler–Bouwkamp constant In plane geometry, the Kepler–Bouwkamp constant (or Polygon inscribing constant) is obtained as a limit of the following sequence. Take a circle of radius 1. Inscribe a regular triangle in this circle. Inscribe a circle in this triangle. Inscribe a square in it. Inscribe a circle, regular pentagon, circle, regular hexagon and so forth. The radius of the limiting circle is called the Kepler–Bouwkamp constant (Finch, 2003), it is the inverse of the polygon circumscribing constant. ==Numerical value of the Kepler–Bouwkamp constant== The decimal expansion of the Kepler–Bouwkamp constant is : $\backslash prod\_^\backslash infty\; \backslash cos\backslash left(\backslash frac\backslash pi\; k\backslash right)\; =\; 0.1149420448\backslash dots.$ If the product is taken over the odd primes, the constant : $\backslash prod\_\; \backslash cos\backslash left(\backslash frac\backslash pi\; k\backslash right)\; =$ 0.312832\ldots is obtained . 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Kepler–Bouwkamp constant」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.