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A073052 Decimal expansion of Cos(Pi/7). 1
9, 0, 0, 9, 6, 8, 8, 6, 7, 9, 0, 2, 4, 1, 9, 1, 2, 6, 2, 3, 6, 1, 0, 2, 3, 1, 9, 5, 0, 7, 4, 4, 5, 0, 5, 1, 1, 6, 5, 9, 1, 9, 1, 6, 2, 1, 3, 1, 8, 5, 7, 1, 5, 0, 0, 5, 3, 5, 6, 2, 4, 2, 3, 1, 9, 9, 4, 3, 2, 4, 2, 0, 4, 2, 7, 9, 3, 9, 9, 6, 5, 5, 0, 1, 3, 6, 1, 4, 5, 4, 7, 1, 8, 5, 1, 2, 4, 1, 5, 3, 1, 8, 3, 1, 0 (list; constant; graph; refs; listen; history; internal format)
OFFSET

0,1

COMMENTS

Cos(Pi/7) = 0.90096886790241912623610231950744505116139...

LINKS

MathPages, Radical Expression For cos(2pi/7)

FORMULA

Equals 2F1(5/7,2/7;1/2;3/4) / 2 . [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 27 2008]

MATHEMATICA

RealDigits[ Cos[Pi/7], 10, 105] [[1]]

CROSSREFS

Sequence in context: A199870 A132267 A021115 * A176908 A005083 A050453

Adjacent sequences:  A073049 A073050 A073051 * A073053 A073054 A073055

KEYWORD

cons,nonn

AUTHOR

Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 15 2002

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Last modified February 14 23:53 EST 2012. Contains 205689 sequences.