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Decimal expansion of the arclength on y = sin(x) from (0,0) to (Pi/4,sqrt(2)).
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%I #5 Jul 01 2020 22:31:37

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

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

%U 8,2,6,3,6,1,2,3,6,9,4,7,9,4,8,0,8,2

%N Decimal expansion of the arclength on y = sin(x) from (0,0) to (Pi/4,sqrt(2)).

%e arclength = 1.05809550139256305772788939193594688774...

%t r = NIntegrate[Sqrt[1 + Cos[t]^2], {t, 0, Pi/4}, WorkingPrecision -> 200]

%t RealDigits[r][[1]]

%Y Cf. A335929, A335930, A335931.

%K nonn,cons

%O 1,3

%A _Clark Kimberling_, Jul 01 2020