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Fungrim entry: b7d62b

Re⁡ ⁣(ez)=eRe⁡(z)cos⁡ ⁣(Im⁡(z))\operatorname{Re}\!\left({e}^{z}\right) = {e}^{\operatorname{Re}(z)} \cos\!\left(\operatorname{Im}(z)\right)
Assumptions:z∈Cz \in \mathbb{C}
TeX:
\operatorname{Re}\!\left({e}^{z}\right) = {e}^{\operatorname{Re}(z)} \cos\!\left(\operatorname{Im}(z)\right)

z \in \mathbb{C}
Definitions:
Fungrim symbol Notation Short description
ReRe⁡(z)\operatorname{Re}(z) Real part
Expez{e}^{z} Exponential function
Coscos⁡(z)\cos(z) Cosine
ImIm⁡(z)\operatorname{Im}(z) Imaginary part
CCC\mathbb{C} Complex numbers
Source code for this entry:
Entry(ID("b7d62b"),
    Formula(Equal(Re(Exp(z)), Mul(Exp(Re(z)), Cos(Im(z))))),
    Variables(z),
    Assumptions(Element(z, CC)))

Topics using this entry

Copyright (C) Fredrik Johansson and contributors. Fungrim is provided under the MIT license. The source code is on GitHub.

2021-03-15 19:12:00.328586 UTC