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RE: Re: Wrestling with Mathematica on Trig Simplification

• To: mathgroup at smc.vnet.net
• Subject: [mg32270] RE: [mg32247] Re: Wrestling with Mathematica on Trig Simplification
• From: "David Park" <djmp at earthlink.net>
• Date: Wed, 9 Jan 2002 23:37:28 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

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 earthlink.net
http://home.earthlink.net/~djmp/

> From: Poppo [mailto:rlsmith at his.com]
To: mathgroup at smc.vnet.net

>
> Why write m[a_,b_][t_] instead of m[a_,b_,t_]?
>
>