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MathGroup Archive 2002

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Re: Re: Wrestling with Mathematica on Trig Simplification

  • To: mathgroup at
  • Subject: [mg32618] Re: Re: Wrestling with Mathematica on Trig Simplification
  • From: "Ranit" <fink at>
  • Date: Thu, 31 Jan 2002 01:46:03 -0500 (EST)
  • Organization: Columbia University
  • References: <a1j768$r58$>
  • Sender: owner-wri-mathgroup at

Do you know a good book or site that teaches mathematica?

"David Park" <djmp at> wrote in message
news:a1j768$r58$1 at
> Steven,
> It isn't absolute necessary to write the definition this way.
> m[a_, b_][t_] := a Sin[t] + b Cos[t]
> In you initial posting you didn't define a and b as arguments of the
> function at all. I think that is because you considered them as parameters
> and t as the variable. Writing the above form cleanly separates the
> parameters from the variable.
> Also you can easily write the derivative with respect to the variable.
> m[a, b]'[t]
> a Cos[t] - b Sin[t]
> But it is really a matter of taste and how you are going to use the
> definition.
> David Park
> djmp at
> > From: Poppo [mailto:rlsmith at]
To: mathgroup at
> >
> > Why write m[a_,b_][t_] instead of m[a_,b_,t_]?
> >
> >

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