A195701 - OEIS

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A195701

Decimal expansion of arctan(sqrt(2/3)).

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

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OFFSET

0,1

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..5000

FORMULA

Equals arcsin(sqrt(2/5)) = arccos(sqrt(3/5)). - Amiram Eldar, Jul 10 2023

EXAMPLE

arctan(sqrt(2/3)) = 0.68471920300...

MATHEMATICA

r = Sqrt[2/3];

N[ArcSin[r], 100]