login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A200423 Decimal expansion of least x>0 satisfying 4*x^2+4*x+3=tan(x). 2

%I

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

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

%U 8,3,8,7,8,0,9,8,1,4,7,5,5,3,0,3,7,8,0,0,7,7,1,5,0,0,9,8,1,3,7

%N Decimal expansion of least x>0 satisfying 4*x^2+4*x+3=tan(x).

%C See A200338 for a guide to related sequences. The Mathematica program includes a graph.

%e x=1.5160814959587838339140415573108641707632843...

%t a = 4; b = 4; c = 3;

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

%t Plot[{f[x], g[x]}, {x, -.1, Pi/2}, {AxesOrigin -> {0, 0}}]

%t r = x /. FindRoot[f[x] == g[x], {x, 1.51, 1.52}, WorkingPrecision -> 110]

%t RealDigits[r] (* A200423 *)

%Y Cf. A200338.

%K nonn,cons

%O 1,2

%A _Clark Kimberling_, Nov 18 2011

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 31 14:48 EDT 2021. Contains 346374 sequences. (Running on oeis4.)