A019903 - OEIS

%I #25 Aug 01 2021 11:07:16

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

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

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

%N Decimal expansion of tangent of 5 degrees.

%C Also the decimal expansion of cotangent of 85 degrees. - _Mohammad K. Azarian_, Jun 30 2013

%C Or tangent of Pi/36 radians or cotangent of 17Pi/36 radians. - _Alonso del Arte_, Jun 30 2013

%H Ivan Panchenko, <a href="/A019903/b019903.txt">Table of n, a(n) for n = 0..1000</a>

%e 0.0874886635259240052220186694...

%t RealDigits[Tan[Pi/36], 10, 105][[1]] (* _Alonso del Arte_, Jun 30 2013 *)

%t Join[{0},RealDigits[Tan[5 Degree],10,120][[1]]] (* _Harvey P. Dale_, Aug 01 2021 *)

%K nonn,cons

%O 0,2

%A _N. J. A. Sloane_.

%E Zero added in front by _R. J. Mathar_, Feb 05 2009