cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-4 of 4 results.

A019894 Decimal expansion of sine of 85 degrees.

Original entry on oeis.org

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

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Author

N. J. A. Sloane

Keywords

Links

Crossrefs

Cf. A019814, A019819, A019826, A019831, A019877, A019882, A019889, A019894.

Programs

  • Mathematica
    RealDigits[Sin[17*Pi/36],10,99][[1]] (* Stefano Spezia, Feb 09 2025 *)

Formula

Equals cos(Pi/36) = 2F1(13/24,11/24;1/2;3/4) / 2 . - R. J. Mathar, Oct 27 2008
Equals A019877 * A019882 + A019826 * A019831 = A019889 * A019894 + A019814 * A019819. - R. J. Mathar, Jan 27 2021

A019853 Decimal expansion of sine of 44 degrees.

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane

Keywords

Comments

This sequence is also decimal expansion of cosine of 46 degrees. - Mohammad K. Azarian, Jun 29 2013
An algebraic number of degree 24 and denominator 2. - Charles R Greathouse IV, Nov 05 2017

Examples

			0.69465837...

Links

Programs

Formula

Equals 2*A019831*A019877. - R. J. Mathar, Jan 17 2021

A019842 Decimal expansion of sine of 33 degrees.

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane

Keywords

Comments

This sequence is also decimal expansion of cosine of 57 degrees. - Mohammad K. Azarian, Jun 29 2013
An algebraic number of degree 16 and denominator 2. - Charles R Greathouse IV, Aug 27 2017

Links

Programs

Formula

Equals A019831 * A019888 + A019820 * A019877 = (1/2) * A019896 + A019812 * A010527. - R. J. Mathar, Jan 27 2021

A019966 Decimal expansion of tangent of 68 degrees.

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane

Keywords

Comments

Also the decimal expansion of cotangent of 22 degrees. - Ivan Panchenko, Sep 01 2014

Examples

			2.475086853416295825240013246076174321412256645379466555473741...

Links

Crossrefs

Cf. A019877 (sine of 68 degrees).

Programs

  • Magma
    SetDefaultRealField(RealField(100)); R:= RealField(); Tan(17*Pi(R)/45); // G. C. Greubel, Nov 21 2018
  • Mathematica
    RealDigits[Tan[17*Pi/45], 10, 100][[1]] (* G. C. Greubel, Nov 21 2018 *)
RealDigits[Tan[68 Degree],10,120][[1]] (* Harvey P. Dale, Jun 02 2019 *)
  • PARI
    default(realprecision, 100); tan(17*Pi/45) \\ G. C. Greubel, Nov 21 2018
  • Sage
    numerical_approx(tan(17*pi/45), digits=100) # G. C. Greubel, Nov 21 2018
Showing 1-4 of 4 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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