A019897 Decimal expansion of sine of 88 degrees.

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

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• cons

Comments

Equals sin(22*Pi/45). - Wesley Ivan Hurt, Sep 01 2014

An algebraic number of degree 24 and denominator 2. - Charles R Greathouse IV, Aug 27 2017

Examples

			0.9993908270190957300062434400439299644952363066699967731039004...
		

Links

• Ivan Panchenko, Table of n, a(n) for n = 0..1000
• Index entries for algebraic numbers, degree 24

Programs

Maple

Digits:=100: evalf(sin(22*Pi/45)); # Wesley Ivan Hurt, Sep 01 2014

Mathematica

RealDigits[Sin[22 Pi/45], 10, 100, -1][[1]] (* Wesley Ivan Hurt, Sep 01 2014 *)

PARI

cos(Pi/90) \\ Charles R Greathouse IV, Aug 27 2017

Formula

Equals 2*A019853*A019855. - R. J. Mathar, Jan 17 2021