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A019818 Decimal expansion of sine of 9 degrees. 4
1, 5, 6, 4, 3, 4, 4, 6, 5, 0, 4, 0, 2, 3, 0, 8, 6, 9, 0, 1, 0, 1, 0, 5, 3, 1, 9, 4, 6, 7, 1, 6, 6, 8, 9, 2, 3, 1, 3, 8, 9, 9, 8, 9, 2, 0, 8, 5, 6, 6, 0, 7, 9, 0, 0, 8, 4, 6, 4, 1, 3, 4, 6, 0, 5, 7, 7, 5, 8, 7, 9, 3, 3, 0, 5, 6, 2, 3, 5, 7, 9, 3, 3, 6, 6, 9, 5, 8, 7, 2, 6, 7, 6, 8, 4, 8, 6, 8, 8 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Also the imaginary part of i^(1/10). [Stanislav Sykora, Apr 25 2012]

LINKS

Ivan Panchenko, Table of n, a(n) for n = 0..1000

Wikipedia, Exact trigonometric constants, Wikipedia

FORMULA

0.1564344650402308690101053194671668923138...

sqrt(8-2*sqrt(10+2*sqrt(5)))/4 = sqrt((1/2)*(1 - sqrt((1/8)*(5 + sqrt(5))))). - Herman Jamke (hermanjamke(AT)fastmail.fm), Nov 13 2006

MATHEMATICA

RealDigits[Sin[9 Degree], 10, 120][[1]] (* Harvey P. Dale, Sep 15 2014 *)

CROSSREFS

Sequence in context: A087197 A221216 A229073 * A187146 A128632 A197490

Adjacent sequences:  A019815 A019816 A019817 * A019819 A019820 A019821

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified December 21 04:56 EST 2014. Contains 252293 sequences.