A195769 Decimal expansion of arctan(5).

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

Offset

1,2

Links

Table of n, a(n) for n=1..100.

Formula

Equals arcsin(5/sqrt(26)) = arccos(1/sqrt(26)). - Amiram Eldar, Jul 11 2023

Example

arctan(5) = 1.373400766945015860861271926444961148650999...

Mathematica

r = 5;
N[ArcTan[r], 100]
RealDigits[%] (* A195769 *)
N[ArcCot[r], 100]
RealDigits[%] (* A105532 *)
N[ArcSec[r], 100]
RealDigits[%] (* A195771 *)
N[ArcCsc[r], 100]
RealDigits[%] (* A195772 *)

Crossrefs

Cf. A105532, A195771, A195772.

Sequence in context: A117190 A113584 A111383 * A021968 A132821 A247217

Adjacent sequences: A195766 A195767 A195768 * A195770 A195771 A195772

Keyword

nonn,cons

Author

Clark Kimberling, Sep 24 2011

Status

approved