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A019966 Decimal expansion of tangent of 68 degrees. 1
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 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

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

LINKS

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

EXAMPLE

2.475086853416295825240013246076174321412256645379466555473741...

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 *)

PROG

(PARI) default(realprecision, 100); tan(17*Pi/45) \\ G. C. Greubel, Nov 21 2018

(MAGMA) SetDefaultRealField(RealField(100)); R:= RealField(); Tan(17*Pi(R)/45); // G. C. Greubel, Nov 21 2018

(Sage) numerical_approx(tan(17*pi/45), digits=100) # G. C. Greubel, Nov 21 2018

CROSSREFS

Cf. A019877 (sine of 68 degrees).

Sequence in context: A230724 A167280 A236629 * A021408 A011178 A136790

Adjacent sequences:  A019963 A019964 A019965 * A019967 A019968 A019969

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified April 4 07:32 EDT 2020. Contains 333213 sequences. (Running on oeis4.)