A019959 - OEIS

A019959

Decimal expansion of tangent of 61 degrees.

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

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OFFSET

1,2

COMMENTS

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

LINKS

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

EXAMPLE

1.80404775527142393738178474823700772431565705569852176945667786458...

MATHEMATICA

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 *)

PROG

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

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

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

CROSSREFS

Cf. A019870 (sine of 61 degrees).

Sequence in context: A154214 A330448 A354635 * A200482 A073824 A242673

Adjacent sequences: A019956 A019957 A019958 * A019960 A019961 A019962

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane

STATUS

approved