login
A334845
Decimal expansion of arclength between (0,1) and (Pi/4,sqrt(2)) on y = sec x.
0
9, 2, 4, 6, 7, 5, 3, 4, 8, 3, 5, 3, 6, 0, 7, 9, 5, 9, 9, 9, 5, 8, 8, 4, 2, 6, 2, 3, 8, 4, 6, 1, 9, 6, 9, 6, 5, 8, 8, 0, 7, 2, 3, 2, 8, 4, 6, 5, 0, 3, 3, 9, 5, 5, 0, 3, 1, 6, 5, 2, 7, 9, 2, 6, 8, 0, 8, 6, 8, 9, 2, 5, 5, 3, 5, 3, 8, 6, 8, 6, 9, 7, 4, 3, 7, 0
OFFSET
0,1
EXAMPLE
arclength = 0.9246753483536079599958842623846196965880723284650...
MATHEMATICA
s = Integrate[Sqrt[1 + D[Sec[x], x]^2], {x, 0, Pi/4}]
r = N[s, 200]
RealDigits[r][[1]]
CROSSREFS
Sequence in context: A176517 A020784 A111188 * A195405 A089065 A248319
KEYWORD
nonn,cons,easy
AUTHOR
Clark Kimberling, Jun 15 2020
STATUS
approved