       Newbie mathematica question

• To: mathgroup at smc.vnet.net
• Subject: [mg37123] Newbie mathematica question
• From: "Anonymous" <not at for.you>
• Date: Thu, 10 Oct 2002 03:21:13 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

Hi, I have defined a function from R -> R^3 as follows:

f[t_] = {t + Sqrt Sin[t], 2 Cos[t], t Sqrt - Sin[t]}

So It's basically a vector whose coordinates are determined based on the
values you pass in.

Then I took the derivative by just typing f', which outputs

{1 + Sqrt Cos[#1], -2 Sin[#1], Sqrt - Cos[#1]}&

What I'd like to do is have Mathematica calculate the norm of this as it
would any vector, so that I can play with the norm function.  As it turns
out, the norm in this case is identical to Sqrt, so it would be nice if
Mathematica could figure that out.  Is it possible to do this?

Thanks

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