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A019948
Decimal expansion of tangent of 50 degrees.
1
1, 1, 9, 1, 7, 5, 3, 5, 9, 2, 5, 9, 4, 2, 0, 9, 9, 5, 8, 7, 0, 5, 3, 0, 8, 0, 7, 1, 8, 6, 0, 4, 1, 9, 3, 3, 6, 9, 3, 0, 7, 0, 0, 4, 0, 7, 7, 0, 8, 5, 4, 3, 8, 5, 3, 6, 5, 4, 8, 3, 0, 0, 0, 6, 9, 0, 3, 4, 1, 2, 1, 4, 5, 8, 9, 0, 5, 5, 1, 7, 7, 2, 7, 5, 8, 1, 0, 9, 3, 9, 4, 2, 7, 3, 7, 7, 7, 7, 3
OFFSET
1,3
COMMENTS
Also the decimal expansion of cotangent of 40 degrees. - Ivan Panchenko, Sep 01 2014
LINKS
EXAMPLE
1.19175359259420995870530807186041933693070040770854385365483...
MATHEMATICA
RealDigits[Tan[5*Pi/18], 10, 100][[1]] (* G. C. Greubel, Nov 23 2018 *)
PROG
(PARI) default(realprecision, 100); tan(5*Pi/18) \\ G. C. Greubel, Nov 23 2018
(Magma) SetDefaultRealField(RealField(100)); R:= RealField(); Tan(5*Pi(R)/18); // G. C. Greubel, Nov 23 2018
(Sage) numerical_approx(tan(5*pi/18), digits=100) # G. C. Greubel, Nov 23 2018
CROSSREFS
Cf. A019859 (sine of 50 degrees).
Sequence in context: A244861 A058969 A021113 * A154207 A200101 A371095
KEYWORD
nonn,cons
STATUS
approved