... Also, using the exponential function of a complex variable, it can be expressed as e i z =cos z + i sin z . In particular, the equation z = i θ (θ is a real number), e i θ =cosθ+ i sinθ, is called Euler's formula. Figure 4 shows a graph of a trigonometric function. ... *Some of the terminology that mentions "Euler's formula" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
… また,複素変数の指数関数,を用いると,と表され,eiz=cosz+isinzが成立する。とくにz=iθ(θは実数)とした式, eiθ=cosθ+isinθをオイラーの公式Euler’s formulaという。図4に三角関数のグラフを示す。… ※「Euler's formula」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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