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Re: usage of TrigToExp?

  • To: mathgroup at
  • Subject: [mg95449] Re: usage of TrigToExp?
  • From: Helen Read <hpr at>
  • Date: Mon, 19 Jan 2009 02:55:52 -0500 (EST)
  • References: <gkv0a9$de1$>
  • Reply-to: HPR <read at>

zatuch wrote:
> Hello,
> Results from function TrigToExp seemed weird to me. Could anyone
> please give me a good explanation on its usage. Thanks a lot.
> In[41]:= TrigToExp[Cos[2 x]]
> During evaluation of In[41]:= Nonreal::warning: Nonreal number
> encountered.
> Out[41]= Nonreal
> In[43]:= TrigToExp[Cos[y] Sin[x]]
> Out[43]= 0

It looks as though you loaded the old Miscellanous`RealOnly package. Try 
again in a fresh session, without loading RealOnly.

Helen Read
University of VErmont

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