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A137915
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Decimal expansion of 180*arccos(1/3)/Pi.
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2
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7, 0, 5, 2, 8, 7, 7, 9, 3, 6, 5, 5, 0, 9, 3, 0, 8, 6, 3, 0, 7, 5, 4, 0, 0, 0, 6, 6, 0, 0, 3, 7, 5, 6, 4, 0, 3, 6, 9, 9, 3, 1, 5, 6, 8, 9, 9, 0, 9, 2, 0, 5, 1, 7, 1, 1, 8, 2, 8, 8, 9, 3, 6, 4, 3, 9, 6, 0, 2, 5, 3, 5, 6, 1, 9, 3, 9, 6, 0, 4, 4, 3, 6, 6, 3, 8, 1, 2, 8, 7, 1, 1, 6, 3, 9, 4, 1, 2, 3, 5, 4, 3, 1, 4, 8
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OFFSET
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2,1
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COMMENTS
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Dihedral angle in degrees of regular tetrahedron.
Polar angle (or apex angle) of the cone that subtends exactly one third of the full solid angle. - Stanislav Sykora, Feb 20 2014
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LINKS
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FORMULA
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180*A137914/Pi = 180*arccos(1/3)/Pi.
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EXAMPLE
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70.52877936550930863075400066003756403699315689909205171182889364396025356...
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MATHEMATICA
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RealDigits[180 ArcCos[1/3]/Pi, 10, 120][[1]] (* Harvey P. Dale, Jul 13 2013 *)
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PROG
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(PARI) 180*acos(1/3)/Pi
(Magma) SetDefaultRealField(RealField(100)); R:= RealField(); 180*Arccos(1/3)/Pi(R); // G. C. Greubel, Aug 20 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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