Re: Re: Good idea to use ArcTan[x,y] in Solve[], Integrate[] etc?

*To*: mathgroup at smc.vnet.net*Subject*: [mg37366] Re: [mg37336] Re: Good idea to use ArcTan[x,y] in Solve[], Integrate[] etc?*From*: David Terr <dterr at wolfram.com>*Date*: Fri, 25 Oct 2002 02:47:11 -0400 (EDT)*Organization*: WRI*References*: <ap5b24$3v9$1@smc.vnet.net> <200210240655.CAA05054@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Jens-Peer Kuska wrote: > Hi, > > a potential division by 0 in ArcTan[y/x] ? > > Regards > Jens > > Frank Iannarilli wrote: > > > > Hi, > > > > Is there any wisdom on whether one should employ or avoid the > > 2-argument form of ArcTan[], versus ArcTan[y/x], in expressions > > involving Solve[] and Integrate[]? > > > > Is there any harm? Is there any benefit? > > > > Thanks! The 2-argument form provides a bit more information since it takes the signs of x and y into account and allows x to be zero. I imagine this could be helpful when used with Solve, but I don't know about Integrate. David

**References**:**Re: Good idea to use ArcTan[x,y] in Solve[], Integrate[] etc?***From:*Jens-Peer Kuska <kuska@informatik.uni-leipzig.de>