login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A199729 Decimal expansion of x>0 satisfying x^2-3*x*cos(x)=2*sin(x). 2

%I #5 Mar 30 2012 18:57:58

%S 1,5,0,8,8,1,6,7,0,3,3,4,9,5,0,3,0,5,0,7,8,1,0,1,8,0,8,2,7,2,2,1,6,3,

%T 4,0,4,3,9,1,6,0,1,1,1,5,3,6,3,4,9,5,7,1,8,3,5,6,9,7,7,9,0,0,4,5,5,7,

%U 7,3,8,6,2,8,6,5,0,7,4,7,7,6,6,5,3,0,0,1,4,4,2,4,5,8,4,3,7,4,7

%N Decimal expansion of x>0 satisfying x^2-3*x*cos(x)=2*sin(x).

%C See A199597 for a guide to related sequences. The Mathematica program includes a graph.

%e x=1.50881670334950305078101808272216340439160111...

%t a = 1; b = -3; c = 2;

%t f[x_] := a*x^2 + b*x*Cos[x]; g[x_] := c*Sin[x]

%t Plot[{f[x], g[x]}, {x, -2 Pi, Pi}, {AxesOrigin -> {0, 0}}]

%t r = x /. FindRoot[f[x] == g[x], {x, 1.50, 1.51}, WorkingPrecision -> 110]

%t RealDigits[r] (* A199729 *)

%Y Cf. A199597.

%K nonn,cons

%O 1,2

%A _Clark Kimberling_, Nov 09 2011

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 19 17:38 EDT 2024. Contains 371797 sequences. (Running on oeis4.)