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Re: This should evaluate to zero

  • To: mathgroup at
  • Subject: [mg40018] Re: This should evaluate to zero
  • From: atelesforos at (Orestis Vantzos)
  • Date: Sun, 16 Mar 2003 02:20:37 -0500 (EST)
  • References: <b4mnhk$iig$> <b4pg2c$c06$> <b4s8k6$iec$>
  • Sender: owner-wri-mathgroup at

In any case,
does return 1+Sqrt[2]


jf.alcover at (jf alcover) wrote in message news:<b4s8k6$iec$1 at>...
> atelesforos at (Orestis Vantzos) wrote in message news:<b4pg2c$c06$1 at>...
> > Actually, ArcSinh[1] is equal to Log[1+Sqrt[2]]
> Orestis,
> You're right, and Mathematica 'knows' that but it seems not to know
> that it's also equal to Log[3363+2378*Sqrt[2]]/10
> The most straightforward solution to this trouble seems to be the one provided
> by Vladimir Bondarenko <vvb at> :
> In[1] := expr = ArcSinh[1]-Log[3363+2378*Sqrt[2]]/10;
> In[2] := FullSimplify[expr, ComplexityFunction -> Length]
> Out[2] = 0
> ------
> jfa

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