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A200643
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Decimal expansion of least x>0 satisfying 7*x^2=tan(x).
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2
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1, 5, 0, 8, 0, 6, 3, 8, 7, 5, 0, 8, 5, 6, 5, 4, 9, 9, 0, 0, 6, 8, 7, 1, 0, 4, 0, 4, 9, 4, 2, 1, 0, 1, 5, 5, 9, 2, 6, 1, 7, 9, 8, 8, 8, 2, 3, 7, 2, 4, 0, 6, 5, 2, 3, 2, 8, 7, 9, 4, 8, 7, 4, 1, 5, 0, 7, 5, 0, 7, 9, 6, 8, 6, 8, 2, 1, 4, 7, 9, 7, 9, 8, 6, 3, 5, 9, 0, 5, 9, 2, 9, 5, 6, 1, 7, 1, 8, 9
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OFFSET
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1,2
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COMMENTS
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See A200614 for a guide to related sequences. The Mathematica program includes a graph.
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LINKS
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Table of n, a(n) for n=1..99.
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EXAMPLE
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x=1.50806387508565499006871040494210155926179888...
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MATHEMATICA
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a = 7; c = 0;
f[x_] := a*x^2 - c; g[x_] := Tan[x]
Plot[{f[x], g[x]}, {x, -.1, Pi/2}, {AxesOrigin -> {0, 0}}]
r = x /. FindRoot[f[x] == g[x], {x, 1.5, 1.51}, WorkingPrecision -> 110]
RealDigits[r] (* A200643 *)
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CROSSREFS
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Cf. A200338.
Sequence in context: A147666 A343071 A215892 * A200231 A124914 A199376
Adjacent sequences: A200640 A200641 A200642 * A200644 A200645 A200646
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KEYWORD
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nonn,cons
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AUTHOR
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Clark Kimberling, Nov 20 2011
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STATUS
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approved
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