login
A198501
Decimal expansion of x>0 having 3*x^2=sin(x).
2
3, 2, 7, 4, 0, 9, 7, 7, 4, 2, 7, 7, 0, 3, 7, 5, 9, 2, 3, 3, 5, 6, 6, 4, 0, 8, 1, 0, 6, 2, 1, 0, 8, 2, 9, 2, 0, 9, 2, 6, 4, 1, 8, 9, 7, 5, 1, 2, 9, 1, 9, 2, 7, 4, 9, 4, 5, 7, 5, 1, 6, 6, 4, 8, 7, 2, 8, 9, 7, 7, 7, 6, 1, 2, 5, 5, 3, 7, 3, 1, 1, 3, 9, 4, 7, 6, 3, 0, 1, 8, 4, 0, 5, 1, 5, 1, 9, 1, 5
OFFSET
0,1
COMMENTS
See A198414 for a guide to related sequences. The Mathematica program includes a graph.
EXAMPLE
x=0.3274097742770375923356640810621082...
MATHEMATICA
a = 3; b = 0; c = 1;
f[x_] := a*x^2 + b*x; g[x_] := c*Sin[x]
Plot[{f[x], g[x]}, {x, -.5, .5}]
r = x /. FindRoot[f[x] == g[x], {x, .32, .33}, WorkingPrecision -> 110]
RealDigits[r] (* A198501 *)
PROG
(PARI) solve(x=.3, 1, sin(x)-3*x^2) \\ Charles R Greathouse IV, Mar 25 2015
CROSSREFS
Cf. A198414.
Sequence in context: A075270 A067872 A318457 * A230072 A345947 A350001
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Oct 25 2011
STATUS
approved