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Fungrim entry: 5278da

π=4atan⁡ ⁣(12)+4atan⁡ ⁣(15)+4atan⁡ ⁣(18)\pi = 4 \operatorname{atan}\!\left(\frac{1}{2}\right) + 4 \operatorname{atan}\!\left(\frac{1}{5}\right) + 4 \operatorname{atan}\!\left(\frac{1}{8}\right)
TeX:
\pi = 4 \operatorname{atan}\!\left(\frac{1}{2}\right) + 4 \operatorname{atan}\!\left(\frac{1}{5}\right) + 4 \operatorname{atan}\!\left(\frac{1}{8}\right)
Definitions:
Fungrim symbol Notation Short description
Piπ\pi The constant pi (3.14...)
Atanatan⁡(z)\operatorname{atan}(z) Inverse tangent
Source code for this entry:
Entry(ID("5278da"),
    Formula(Equal(Pi, Add(Add(Mul(4, Atan(Div(1, 2))), Mul(4, Atan(Div(1, 5)))), Mul(4, Atan(Div(1, 8)))))))

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2021-03-15 19:12:00.328586 UTC