A019967 Decimal expansion of tangent of 69 degrees.

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

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• cons

Comments

Also the decimal expansion of cotangent of 21 degrees. - Ivan Panchenko, Sep 01 2014

Examples

			2.605089064693801536258412336433541186093287267943195023752...
		

Links

• Ivan Panchenko, Table of n, a(n) for n = 1..1000
• Wikipedia, Exact trigonometric constants

Crossrefs

Cf. A019878 (sine of 69 degrees).

Programs

Magma

SetDefaultRealField(RealField(100)); R:= RealField(); Tan(23*Pi(R)/60); // G. C. Greubel, Nov 21 2018

Mathematica

RealDigits[Tan[23*Pi/60], 10, 100][[1]] (* G. C. Greubel, Nov 20 2018 *)

PARI

default(realprecision, 100); tan(23*Pi/60) \\ G. C. Greubel, Nov 21 2018

Sage

numerical_approx(tan(23*pi/60), digits=100) # G. C. Greubel, Nov 21 2018