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A019884 Decimal expansion of sine of 75 degrees. 4
9, 6, 5, 9, 2, 5, 8, 2, 6, 2, 8, 9, 0, 6, 8, 2, 8, 6, 7, 4, 9, 7, 4, 3, 1, 9, 9, 7, 2, 8, 8, 9, 7, 3, 6, 7, 6, 3, 3, 9, 0, 4, 8, 3, 9, 0, 0, 8, 4, 0, 4, 5, 5, 0, 4, 0, 2, 3, 4, 3, 0, 7, 6, 3, 1, 0, 4, 2, 3, 2, 1, 3, 9, 7, 9, 8, 5, 5, 5, 1, 6, 3, 4, 7, 5, 6, 1, 7, 4, 1, 8, 5, 8, 0, 7, 0, 4, 5, 1 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Also the real part of i^(1/6). - Stanislav Sykora, Apr 25 2012

Length of one side of the new Type 15 Convex Pentagon. - Michel Marcus, Aug 04 2015

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Casey Mann et al, Type 15 Convex Pentagon, 29 July 2015.

Wikipedia, Exact trigonometric constants

FORMULA

Equals cos(Pi/12) = [1+sqrt(3)]/[2*sqrt(2)] = A090388 * A020765. - R. J. Mathar, Jun 18 2006

EXAMPLE

0.96592582628906828674974319972889736763390483900840455040234307631042...

MATHEMATICA

RealDigits[Sin[75 Degree], 10, 100][[1]] (* Vincenzo Librandi, Aug 11 2014 *)

PROG

(PARI) cos(Pi/12) \\ Charles R Greathouse IV, Apr 25 2012

CROSSREFS

Sequence in context: A019942 A102047 A144665 * A103814 A245770 A117020

Adjacent sequences:  A019881 A019882 A019883 * A019885 A019886 A019887

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified March 24 06:12 EDT 2017. Contains 283984 sequences.