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A200288
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Decimal expansion of greatest x satisfying 4*x^2 - cos(x) = 2*sin(x).
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3
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7, 1, 9, 3, 8, 4, 2, 6, 0, 4, 5, 9, 8, 7, 5, 8, 3, 2, 1, 0, 7, 5, 5, 2, 4, 1, 1, 5, 9, 1, 3, 8, 0, 6, 1, 7, 5, 5, 7, 6, 3, 3, 7, 2, 7, 5, 5, 4, 2, 4, 6, 3, 4, 1, 9, 6, 7, 5, 8, 9, 1, 7, 2, 4, 8, 5, 5, 8, 5, 3, 7, 4, 4, 4, 3, 4, 0, 5, 7, 4, 5, 9, 8, 7, 5, 5, 2, 9, 0, 4, 2, 5, 1, 9, 8, 0, 5, 8, 3
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OFFSET
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0,1
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COMMENTS
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See A199949 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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least x: -0.300931885421902370031006240717514956...
greatest x: 0.7193842604598758321075524115913806...
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MATHEMATICA
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a = 4; b = -1; c = 2;
f[x_] := a*x^2 + b*Cos[x]; g[x_] := c*Sin[x]
Plot[{f[x], g[x]}, {x, -1, 1}, {AxesOrigin -> {0, 0}}]
r = x /. FindRoot[f[x] == g[x], {x, -.31, -.30}, WorkingPrecision -> 110]
r = x /. FindRoot[f[x] == g[x], {x, .71, .72}, WorkingPrecision -> 110]
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PROG
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(PARI) a=4; b=-1; c=2; solve(x=0, 1, a*x^2 + b*cos(x) - c*sin(x)) \\ G. C. Greubel, Jul 07 2018
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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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