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 Author Comment/Response Michael 05/27/12 07:20am In Response To 'Re: Re: Re: Re: making a transformation'---------The key is the expression you are applying the replacement to. Case Init: In[140]:= A = 2; B = 4; w = 1000; FullSimplify[A Cos[w t] - B Sin[w t]] Out[141]= 2 (Cos[1000 t] - 2 Sin[1000 t]) Case Cleared: In[142]:= Clear[A, B, w]; FullSimplify[A Cos[w t] - B Sin[w t]] Out[143]= A Cos[t w] - B Sin[t w] In Case Init, where the coefficients are numbers, the simplified expression has no coefficient in front of Cos. So your pattern, a_ Cos[c_] - b_ Sin[c_], does not match any subexpression. In Case Cleared, where the coefficient are symbols, the simplified expression does have a coefficient in front of Cos. So your pattern matches the whole expression. URL: mroge02@emory.edu,

 Subject (listing for 'making a transformation') Author Date Posted making a transformation Ed Nowak 05/16/12 05:19am Re: making a transformation Bill Simpson 05/16/12 1:18pm Re: Re: making a transformation Ed Nowak 05/19/12 00:18am Re: Re: making a transformation Ed Nowak 05/19/12 02:14am Re: Re: Re: making a transformation Bill Simpson 05/21/12 00:41am Re: Re: Re: Re: making a transformation Ed Nowak 05/25/12 01:18am Re: Re: Re: Re: making a transformation Ed Nowak 05/25/12 02:23am Re: Re: Re: Re: Re: making a transformation Bill Simpson 05/26/12 10:14pm Re: Re: Re: Re: Re: Re: making a transformation Ed Nowak 05/28/12 7:22pm Re: Re: Re: Re: Re: making a transformation Michael 05/27/12 07:20am Re: making a transformation Ed Nowak 05/18/12 07:25am
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