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A019986
Decimal expansion of tangent of 88 degrees.
2
2, 8, 6, 3, 6, 2, 5, 3, 2, 8, 2, 9, 1, 5, 6, 0, 3, 5, 5, 0, 7, 5, 6, 5, 0, 9, 3, 2, 0, 9, 4, 6, 4, 2, 5, 0, 7, 7, 9, 5, 1, 7, 1, 0, 3, 2, 3, 1, 5, 2, 0, 2, 5, 5, 9, 7, 8, 3, 8, 1, 9, 6, 0, 8, 9, 7, 1, 3, 5, 6, 2, 0, 4, 0, 8, 1, 1, 3, 6, 5, 3, 4, 9, 8, 0, 9, 3, 6, 9, 2, 6, 5, 7, 6, 2, 7, 9, 0, 7
OFFSET
2,1
COMMENTS
Also the decimal expansion of cotangent of 2 degrees. - Ivan Panchenko, Sep 01 2014
The least positive k such that floor(10^k tan 88°) is prime is k = 289 = 17^2. The sum of digits of the resulting prime is the prime 1279, whose sum of digits is the same as that of k, again a prime, 19. - M. F. Hasler, May 19 2023
LINKS
MATHEMATICA
RealDigits[Tan[88 Degree], 10, 120][[1]] (* Harvey P. Dale, Aug 29 2016 *)
CROSSREFS
Cf. A019899 - A019987 (same for 1, ..., 89 degrees).
Sequence in context: A264643 A016594 A175803 * A146943 A028352 A132699
KEYWORD
nonn,cons
STATUS
approved