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A201400
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Decimal expansion of x satisfying x^2 + 5 = sec(x) and 0 < x < Pi.
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2
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1, 4, 2, 8, 2, 6, 7, 7, 6, 5, 8, 3, 8, 2, 2, 2, 6, 4, 0, 3, 3, 9, 7, 6, 6, 3, 0, 1, 3, 2, 5, 2, 7, 7, 6, 0, 6, 6, 2, 8, 1, 3, 1, 0, 7, 4, 1, 3, 2, 3, 8, 0, 7, 8, 8, 4, 1, 0, 0, 4, 1, 5, 6, 5, 2, 4, 2, 1, 0, 7, 6, 0, 2, 9, 0, 4, 3, 2, 9, 3, 4, 0, 3, 3, 3, 5, 3, 6, 2, 7, 9, 5, 1, 4, 8, 7, 2, 6, 6
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OFFSET
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1,2
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COMMENTS
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See A201397 for a guide to related sequences. The Mathematica program includes a graph.
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LINKS
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EXAMPLE
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x=1.42826776583822264033976630132527760662...
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MATHEMATICA
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a = 1; c = 5;
f[x_] := a*x^2 + c; g[x_] := Sec[x]
Plot[{f[x], g[x]}, {x, 0, Pi}, {AxesOrigin -> {0, 0}}]
r = x /. FindRoot[f[x] == g[x], {x, 1.4, 1.5}, WorkingPrecision -> 110]
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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