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Fungrim entry: 729b70

Re ⁣(sin ⁣(x+iy))=sin(x)cosh(y)\operatorname{Re}\!\left(\sin\!\left(x + i y\right)\right) = \sin(x) \cosh(y)
Assumptions:xR  and  yRx \in \mathbb{R} \;\mathbin{\operatorname{and}}\; y \in \mathbb{R}
TeX:
\operatorname{Re}\!\left(\sin\!\left(x + i y\right)\right) = \sin(x) \cosh(y)

x \in \mathbb{R} \;\mathbin{\operatorname{and}}\; y \in \mathbb{R}
Definitions:
Fungrim symbol Notation Short description
ReRe(z)\operatorname{Re}(z) Real part
Sinsin(z)\sin(z) Sine
ConstIii Imaginary unit
RRR\mathbb{R} Real numbers
Source code for this entry:
Entry(ID("729b70"),
    Formula(Equal(Re(Sin(Add(x, Mul(ConstI, y)))), Mul(Sin(x), Cosh(y)))),
    Variables(x, y),
    Assumptions(And(Element(x, RR), Element(y, RR))))

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

2020-04-08 16:14:44.404316 UTC