A195781 Decimal expansion of arctan(8).

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, 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, 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

Offset: 1

Author

Clark Kimberling, Sep 24 2011

Keywords

• nonn
• cons

Examples

			arctan(8) = 1.4464413322481351841999668424758804165254145079...
		

Links

• Index entries for transcendental numbers

Crossrefs

Cf. A195782, A195783, A195784.

Programs

Mathematica

r = 8;
N[ArcTan[r], 100]
RealDigits[%][[1]]

PARI

atan(8) \\ Charles R Greathouse IV, Nov 20 2024

Formula

Equals arccot(1/8) = arcsin(8/sqrt(65)) = arccos(1/sqrt(65)). - Amiram Eldar, May 24 2021

Equals arctan(1) + arctan(1/2) + arctan(1/5). - Amiram Eldar, Jan 11 2022