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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 Small-angle approximation ： ウィキペディア英語版 Small-angle approximation The small-angle approximation is a useful simplification of the basic trigonometric functions which is approximately true in the limit where the angle approaches zero. They are truncations of the Taylor series for the basic trigonometric functions to a second-order approximation. This truncation gives: :$\backslash sin\; \backslash theta\; \backslash approx\; \backslash theta$ :$\backslash cos\; \backslash theta\; \backslash approx\; 1\; -\; \backslash frac$ :$\backslash tan\; \backslash theta\; \backslash approx\; \backslash theta$, where θ is the angle in radians. The small angle approximation is useful in many areas of physics, including mechanics, electromagnetics, optics (where it forms the basis of the paraxial approximation), cartography, astronomy, and so on. == Justifications == 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「Small-angle approximation」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.