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

  • To: mathgroup at smc.vnet.net
  • Subject: [mg95865] Re: [mg95808] Compute ArcTan(n Pi+ Pi/2 + O(1))
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Thu, 29 Jan 2009 05:50:52 -0500 (EST)
  • Reply-to: hanlonr at cox.net

Series[ArcTan[n Pi + Pi/2 + d], {d, 0, 1}] // Normal

d/((Pi*n + Pi/2)^2 + 1) + ArcTan[Pi*n + Pi/2]


Bob Hanlon

---- 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



--

Bob Hanlon



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