A019870 -id:A019870 - cp's OEIS frontend

A019896 Decimal expansion of sine of 87 degrees.

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

Offset: 0

N. J. A. Sloane

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

			0.998629534754573873784492058439436580590952290767785532441441...

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

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

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

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

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

A019867 Decimal expansion of sine of 58 degrees.

Original entry on oeis.org

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

Offset: 0

N. J. A. Sloane

An algebraic number of degree 12 and denominator 2. - Charles R Greathouse IV, Aug 27 2017

			0.84804809...

Ivan Panchenko, Table of n, a(n) for n = 0..1000
Index entries for algebraic numbers, degree 12

RealDigits[Sin[58 Degree],10,120][[1]] (* Harvey P. Dale, Apr 24 2018 *)

cos(8*Pi/45) \\ Charles R Greathouse IV, Aug 27 2017

Equals cos(8*Pi/45) = 2F1(23/30,7/30;1/2;3/4) / 2. - R. J. Mathar, Oct 27 2008

Equals 2*A019838*A019870. - R. J. Mathar, Jan 17 2021

A019959 Decimal expansion of tangent of 61 degrees.

Original entry on oeis.org

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

Offset: 1

N. J. A. Sloane

Also the decimal expansion of cotangent of 29 degrees. - Ivan Panchenko, Sep 01 2014

			1.80404775527142393738178474823700772431565705569852176945667786458...

Ivan Panchenko, Table of n, a(n) for n = 1..1000

Cf. A019870 (sine of 61 degrees).

SetDefaultRealField(RealField(100)); R:= RealField(); Tan(61*Pi(R)/180); // G. C. Greubel, Nov 22 2018

RealDigits[Tan[61 Degree],10,120][[1]] (* Harvey P. Dale, Mar 29 2016 *)
RealDigits[Tan[61*Pi/180], 10, 100][[1]] (* G. C. Greubel, Nov 22 2018 *)

default(realprecision, 100); tan(61*Pi/180) \\ G. C. Greubel, Nov 22 2018

numerical_approx(tan(61*pi/180), digits=100) # G. C. Greubel, Nov 22 2018

cp's OEIS Frontend

A019896 Decimal expansion of sine of 87 degrees.

Views

Author

Keywords

Comments

Examples

Links

Programs

Maple

Mathematica

PARI

Formula

A019867 Decimal expansion of sine of 58 degrees.

Views

Author

Keywords

Comments

Examples

Links

Programs

Mathematica

PARI

Formula

A019959 Decimal expansion of tangent of 61 degrees.

Views

Author

Keywords

Comments

Examples

Links

Crossrefs

Programs

Magma

Mathematica

PARI

Sage