A019966 Decimal expansion of tangent of 68 degrees.

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

1,1

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