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Fungrim entry: 464961

π=2111x2dx\pi = 2 \int_{-1}^{1} \sqrt{1 - {x}^{2}} \, dx
TeX:
\pi = 2 \int_{-1}^{1} \sqrt{1 - {x}^{2}} \, dx
Definitions:
Fungrim symbol Notation Short description
ConstPiπ\pi The constant pi (3.14...)
Integralabf(x)dx\int_{a}^{b} f(x) \, dx Integral
Sqrtz\sqrt{z} Principal square root
Powab{a}^{b} Power
Source code for this entry:
Entry(ID("464961"),
    Formula(Equal(ConstPi, Mul(2, Integral(Sqrt(Sub(1, Pow(x, 2))), For(x, -1, 1))))))

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2019-10-05 13:11:19.856591 UTC