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A019949
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Decimal expansion of tangent of 51 degrees.
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1
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1, 2, 3, 4, 8, 9, 7, 1, 5, 6, 5, 3, 5, 0, 5, 1, 3, 9, 8, 5, 5, 6, 1, 7, 4, 6, 9, 5, 3, 7, 5, 9, 3, 5, 1, 4, 0, 0, 5, 3, 6, 2, 5, 5, 8, 4, 0, 7, 7, 9, 7, 6, 5, 3, 6, 4, 2, 1, 2, 5, 9, 2, 0, 8, 8, 4, 3, 7, 5, 7, 3, 0, 1, 3, 4, 7, 7, 4, 0, 2, 1, 4, 1, 2, 3, 1, 2, 8, 7, 0, 4, 0, 6, 4, 3, 5, 3, 8, 1
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OFFSET
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1,2
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COMMENTS
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Also the decimal expansion of cotangent of 39 degrees. - Ivan Panchenko, Sep 01 2014
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LINKS
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FORMULA
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Equals cot(13*Pi/60) = ((2+sqrt(3))*(3-sqrt(5)) -2)*(2 + sqrt(2*(5 + sqrt(5))))/4. - G. C. Greubel, Nov 23 2018
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EXAMPLE
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1.2348971565350513985561746953759351400536255840779765364212592...
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MATHEMATICA
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RealDigits[Tan[17*Pi/60], 10, 100][[1]] (* G. C. Greubel, Nov 23 2018 *)
RealDigits[Tan[51 Degree], 10, 120][[1]] (* Harvey P. Dale, Jan 18 2021 *)
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PROG
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(PARI) default(realprecision, 100); tan(17*Pi/60) \\ G. C. Greubel, Nov 23 2018
(Magma) SetDefaultRealField(RealField(100)); R:= RealField(); Tan(17*Pi(R)/60); // G. C. Greubel, Nov 23 2018
(Sage) numerical_approx(tan(17*pi/60), digits=100) # G. C. Greubel, Nov 23 2018
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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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