Re: Very strange behaviour of ArcTan[]
- To: mathgroup at smc.vnet.net
- Subject: [mg102671] Re: [mg102656] Very strange behaviour of ArcTan[]
- From: "Curtis F. Osterhoudt" <cfo at lanl.gov>
- Date: Tue, 18 Aug 2009 06:08:37 -0400 (EDT)
- References: <200908171206.IAA06945@smc.vnet.net>
- Reply-to: cfo at lanl.gov
You've discovered the two-argument form of ArcTan; that is, it's returning ArcTan[15.9546/0.5]. I suspect you want to feed a precision to Mathematica in another way ... > Hello, > I just have discovered some strange (buggy?) feature of ArcTan[] > function in Mathematica 5.2. Try the following; > > In[72]:= > ArcTan[.5,$MachinePrecision] > ArcTan[.5] > > Out[72]= > 1.53947 > > Out[73]= > 0.463648 > > The expression ArcTan[.5,$MachinePrecision] must (?) give an error but > in really gives some strange output without any error messages... What > do you think about this? > >
- References:
- Very strange behaviour of ArcTan[]
- From: Alexey <lehin.p@gmail.com>
- Very strange behaviour of ArcTan[]