ChebyshevT command syntax and polynomial question using mathematica 6
- To: mathgroup at smc.vnet.net
- Subject: [mg88275] ChebyshevT command syntax and polynomial question using mathematica 6
- From: ratullochjk2 at gmail.com
- Date: Wed, 30 Apr 2008 04:25:31 -0400 (EDT)
Greetings All I execute the command and get the following output: In[83] := FunctionExpand[1/2 Cos[2 ArcCos[x]] + 43/2 - 10 x] // Expand Out[83]:= 21 - 10 x + x^2 What would be the proper format to execute the polynomial using ChebyshevT to do it in reverse order? Example: I would input In[83] := FunctionExpand[ChebyshevT[n, x]] and it gives me Out[83]:= Cos[n ArcCos[x]] How can I do a In[83] := FunctionExpand[ChebyshevT[n, x]] and it would give me Out[83]:= 1/2 Cos[2 ArcCos[x]] + 43/2 - 10 x Is this the best way to go about this? tia sal2