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A232735
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Decimal expansion of the real part of I^(1/7), or cos(Pi/14).
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5
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9, 7, 4, 9, 2, 7, 9, 1, 2, 1, 8, 1, 8, 2, 3, 6, 0, 7, 0, 1, 8, 1, 3, 1, 6, 8, 2, 9, 9, 3, 9, 3, 1, 2, 1, 7, 2, 3, 2, 7, 8, 5, 8, 0, 0, 6, 1, 9, 9, 9, 7, 4, 3, 7, 6, 4, 8, 0, 7, 9, 5, 7, 5, 0, 8, 7, 6, 4, 5, 9, 3, 1, 6, 3, 4, 4, 0, 3, 7, 9, 3, 7, 0, 0, 1, 1, 2, 4, 5, 8, 1, 2, 0, 7, 3, 6, 9, 2, 5, 1, 6, 4, 0, 1, 4
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OFFSET
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0,1
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COMMENTS
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The corresponding imaginary part is in A232736.
Root of the equation -7 + 56*x^2 - 112*x^4 + 64*x^6 = 0. - Vaclav Kotesovec, Apr 04 2021
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LINKS
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EXAMPLE
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0.974927912181823607018131682993931217232785800619997437648...
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MATHEMATICA
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RealDigits[Cos[Pi/14], 10, 120][[1]] (* Harvey P. Dale, Dec 15 2018 *)
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PROG
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(Magma) R:= RealField(100); Cos(Pi(R)/14); // G. C. Greubel, Sep 19 2022
(SageMath) numerical_approx(cos(pi/14), digits=120) # G. C. Greubel, Sep 19 2022
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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