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 1-8 of 8 results.

A051555 Decimal expansion of tan(Pi degrees). (Of course, tan(Pi radians) = 0.)

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane

Keywords

Examples

			tan (Pi^2 / 180) = 0.0548861508080033288...

Crossrefs

Cf. A051553, A051554, A051557-A051559.

Programs

A051554 Decimal expansion of cos(Pi degrees). (Of course, cos(Pi radians) = -1.)

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane

Keywords

Examples

			cos( Pi^2 / 180 ) = .99849714986...

Crossrefs

Cf. A051553, A051555, A051557-A051559.

Programs

A051557 Decimal expansion of cos(Pi/2 degrees). (Of course, cos(Pi/2 radians) = 0.)

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane

Keywords

Examples

			0.999624216...

Crossrefs

Cf. A051553-A051555, A051558, A051559.

Programs

A051559 Decimal expansion of tan(Pi/2 degrees). (Of course, tan(Pi/2 radians) = infinity.)

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane

Keywords

Examples

			0.027422438...

Crossrefs

Cf. A051553-A051555, A051557, A051558.

Programs

  • Maple
    evalf(tan(Pi^2/360)) ;
  • Mathematica
    Join[{0},RealDigits[Tan[Pi/2 Degree],10,120][[1]]] (* Harvey P. Dale, Sep 05 2015 *)
  • PARI
    tan(Pi^2/360) \\ Charles R Greathouse IV, Nov 05 2017

A051558 Decimal expansion of sin(Pi/2 degrees). (Of course, sin(Pi/2 radians) = 1.)

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane

Keywords

Crossrefs

Cf. A051553-A051555, A051557, A051559.

Programs

A073440 Decimal expansion of csc (Pi degrees) (of course csc (Pi radians) is undefined).

Original entry on oeis.org

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

Views

Author

Rick L. Shepherd, Jul 31 2002

Keywords

Examples

			18.2469547845941354008035177376...

Crossrefs

Cf. A051553 (sin(Pi degrees)=1/A073440), A051554 (cos(Pi degrees)), A051555 (tan(Pi degrees)), A073441 (sec(Pi degrees)), A073442 (cot(Pi degrees)).

Programs

  • Mathematica
    RealDigits[Csc[Pi Degree],10,120][[1]] (* Harvey P. Dale, Jan 31 2014 *)
  • PARI
    1/sin(Pi^2/180)

A073441 Decimal expansion of sec (Pi degrees) (of course sec (Pi radians) = -1).

Original entry on oeis.org

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

Views

Author

Rick L. Shepherd, Jul 31 2002

Keywords

Examples

			1.00150511209405161201979209228...

Crossrefs

Cf. A051554 (cos(Pi degrees)=1/A073441), A051553 (sin(Pi degrees)), A051555 (tan(Pi degrees)), A073440 (csc(Pi degrees)), A073442 (cot(Pi degrees)).

Programs

  • Mathematica
    RealDigits[Sec[Pi Degree],10,120][[1]] (* Harvey P. Dale, Apr 06 2019 *)
  • PARI
    1/cos(Pi^2/180)

A073442 Decimal expansion of cot (Pi degrees) (of course cot (Pi radians) is undefined).

Original entry on oeis.org

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

Views

Author

Rick L. Shepherd, Jul 31 2002

Keywords

Examples

			18.2195323461120376322202297457...

Crossrefs

Cf. A051555 (tan(Pi degrees)=1/A073442), A051553 (sin(Pi degrees)), A051554 (cos(Pi degrees)), A073440 (csc(Pi degrees)), A073441 (sec(Pi degrees)).

Programs

  • PARI
    cotan(Pi^2/180)
Showing 1-8 of 8 results.

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

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