A019896 - OEIS

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A019896

Decimal expansion of sine of 87 degrees.

16

9, 9, 8, 6, 2, 9, 5, 3, 4, 7, 5, 4, 5, 7, 3, 8, 7, 3, 7, 8, 4, 4, 9, 2, 0, 5, 8, 4, 3, 9, 4, 3, 6, 5, 8, 0, 5, 9, 0, 9, 5, 2, 2, 9, 0, 7, 6, 7, 7, 8, 5, 5, 3, 2, 4, 4, 1, 4, 4, 1, 2, 5, 4, 8, 3, 1, 6, 4, 8, 9, 7, 3, 7, 3, 3, 4, 7, 8, 3, 1, 8, 6, 3, 5, 3, 3, 2, 0, 2, 8, 2, 3, 3, 2, 7, 5, 4, 5, 0

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OFFSET

0,1

COMMENTS

Equals sin(29*Pi/60). - Wesley Ivan Hurt, Sep 01 2014

An algebraic number of degree 16 and denominator 2. - Charles R Greathouse IV, Aug 27 2017

LINKS

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

Raimundas Vidunas, Expressions for values of the gamma function, math.CA/0403510

Wikipedia, Trigonometric constants expressed in real radicals

Index entries for algebraic numbers, degree 16

FORMULA

Equals cos(Pi/60) = [5-sqrt(5)]*[1+sqrt(3)]*[2-sqrt(3)+sqrt{5+2*sqrt(5)}]/[8*sqrt(10)] = sqrt[(1+A019893)/2]. - R. J. Mathar, Jun 18 2006

Equals A019867 * A019870 + A019838 * A019841 = A019893 * A019896 + A019812 * A019815. - R. J. Mathar, Jan 27 2021

EXAMPLE

0.998629534754573873784492058439436580590952290767785532441441...

MAPLE

Digits:=100: evalf(sin(29*Pi/60)); # Wesley Ivan Hurt, Sep 01 2014

MATHEMATICA

RealDigits[Sin[87Degree], 10, 100][[1]] (* Alonso del Arte, Aug 31 2014 *)

PROG

(PARI) cos(Pi/60) \\ Charles R Greathouse IV, Aug 27 2017

CROSSREFS

Sequence in context: A346727 A346438 A304029 * A175570 A050812 A139345

Adjacent sequences: A019893 A019894 A019895 * A019897 A019898 A019899

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane.

STATUS

approved