Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #17 Nov 20 2024 23:45:39
%S 1,4,4,6,4,4,1,3,3,2,2,4,8,1,3,5,1,8,4,1,9,9,9,6,6,8,4,2,4,7,5,8,8,0,
%T 4,1,6,5,2,5,4,1,4,5,0,7,9,1,7,7,4,8,8,2,0,5,7,2,3,5,8,1,7,7,0,3,8,1,
%U 8,5,9,3,5,7,1,5,5,3,7,7,4,0,6,9,0,3,0,6,8,1,8,3,5,7,7,0,5,2,0,3
%N Decimal expansion of arctan(8).
%H <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>
%F Equals arccot(1/8) = arcsin(8/sqrt(65)) = arccos(1/sqrt(65)). - _Amiram Eldar_, May 24 2021
%F Equals arctan(1) + arctan(1/2) + arctan(1/5). - _Amiram Eldar_, Jan 11 2022
%e arctan(8) = 1.4464413322481351841999668424758804165254145079...
%t r = 8;
%t N[ArcTan[r], 100]
%t RealDigits[%][[1]]
%o (PARI) atan(8) \\ _Charles R Greathouse IV_, Nov 20 2024
%Y Cf. A195782, A195783, A195784.
%K nonn,cons
%O 1,2
%A _Clark Kimberling_, Sep 24 2011