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Re: Compute ArcTan(n Pi+ Pi/2 + O(1))

  • To: mathgroup at smc.vnet.net
  • Subject: [mg95883] Re: Compute ArcTan(n Pi+ Pi/2 + O(1))
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Thu, 29 Jan 2009 05:54:08 -0500 (EST)
  • Organization: Uni Leipzig
  • References: <glpfdv$kje$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de

Hi,

Series[ArcTan[n Pi + Pi/2], {n, Infinity, 2}]

??

Regards
   Jens

Francois at news.free.fr wrote:
> Hello,
> 
> I'm new to Mathematica and I want to compute a serie expantion of
> 
> ArcTan(n Pi + Pi/2 + O(1))   (The O is a big O and is taken when n goes
> to Infinity)
> 
> I dont know how to input O(1) in Mathematica. For example
> O[n,Infinity]^0 simplifies to 1 which is not what I want.
> 
> Thanks for the help.
> Francois
> 
> 


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