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A195628
Decimal expansion of arctan(4).
4
1, 3, 2, 5, 8, 1, 7, 6, 6, 3, 6, 6, 8, 0, 3, 2, 4, 6, 5, 0, 5, 9, 2, 3, 9, 2, 1, 0, 4, 2, 8, 4, 7, 5, 6, 3, 1, 1, 8, 4, 4, 4, 0, 6, 0, 1, 3, 0, 6, 3, 6, 8, 8, 4, 3, 3, 6, 0, 0, 9, 6, 3, 8, 1, 4, 8, 6, 5, 5, 3, 0, 8, 3, 5, 5, 5, 4, 6, 2, 4, 0, 2, 7, 3, 9, 4, 8, 3, 2, 5, 5, 0, 0, 2, 3, 5, 6, 5, 4, 2
OFFSET
1,2
LINKS
FORMULA
Equals arcsin(4/sqrt(17)) = arccos(1/sqrt(17)). - Amiram Eldar, Jul 11 2023
EXAMPLE
arctan(4) = 1.3258176636680324650592392104284756311844406013...
MATHEMATICA
r = 4;
N[ArcTan[r], 100]
RealDigits[%] (* A195628 *)
N[ArcCot[r], 100]
RealDigits[%] (* A195727 *)
N[ArcSec[r], 100]
RealDigits[%] (* A195731 *)
N[ArcCsc[r], 100]
RealDigits[%] (* A195621 *)
PROG
(Magma) SetDefaultRealField(RealField(125)); Arctan(4); // G. C. Greubel, Apr 13 2023
(SageMath) numerical_approx( arctan(4), digits=125) # G. C. Greubel, Apr 13 2023
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Sep 23 2011
STATUS
approved