OFFSET
1,2
FORMULA
arclength = 8 E(-5/4), where E = complete elliptic integral.
EXAMPLE
arclength = 15.8654395892905897913316630277830724967300828483...
MATHEMATICA
s = Integrate[Sqrt[D[ 3 Cos[t], t]^2 + D[2 Sin[t], t]^2], {t, 0, 2 Pi}]
r = N[s, 200]
RealDigits[r][[1]]
CROSSREFS
KEYWORD
AUTHOR
Clark Kimberling, Jun 15 2020
STATUS
approved