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Fungrim entry: 506d0c

sin ⁣(π2+πk)=(1)k\sin\!\left(\frac{\pi}{2} + \pi k\right) = {\left(-1\right)}^{k}
kZk \in \mathbb{Z}
TeX:
\sin\!\left(\frac{\pi}{2} + \pi k\right) = {\left(-1\right)}^{k}
Definitions:
Fungrim symbol Notation Short description
Sinsin ⁣(z)\sin\!\left(z\right) Sine
ConstPiπ\pi The constant pi (3.14...)
Powab{a}^{b} Power
ZZZ\mathbb{Z} Integers
Source code for this entry:
Entry(ID("506d0c"),
    Formula(Equal(Sin(Add(Div(ConstPi, 2), Mul(ConstPi, k))), Pow(-1, k))),
    Variables(k),
    Element(k, ZZ))

Topics using this entry

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2019-08-25 15:30:03.056001 UTC