A199668 Decimal expansion of x>0 satisfying 3*x^2+2*x*cos(x)=3*sin(x).
3, 5, 3, 9, 0, 4, 4, 5, 9, 0, 7, 0, 7, 6, 7, 0, 0, 9, 6, 9, 0, 0, 0, 7, 1, 0, 2, 7, 2, 4, 6, 6, 4, 6, 4, 6, 9, 9, 1, 2, 0, 3, 8, 6, 5, 8, 0, 0, 6, 9, 0, 2, 6, 6, 0, 2, 1, 1, 9, 5, 5, 6, 6, 0, 8, 6, 7, 0, 2, 0, 6, 3, 7, 4, 7, 6, 7, 8, 0, 9, 7, 9, 4, 8, 2, 0, 8, 9, 0, 6, 2, 8, 8, 3, 9, 5, 1, 5, 3
Offset: 0
Examples
0.3539044590707670096900071027246646469912...
Crossrefs
Cf. A199597.
Programs
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Mathematica
a = 3; b = 2; c = 3; f[x_] := a*x^2 + b*x*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, .35, .36}, WorkingPrecision -> 110] RealDigits[r] (* A199668 *)
Comments