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Re: Cos[a x - b] displayed as Cos[b - a x]
*To*: mathgroup at smc.vnet.net
*Subject*: [mg90852] Re: Cos[a x - b] displayed as Cos[b - a x]
*From*: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
*Date*: Sat, 26 Jul 2008 04:22:11 -0400 (EDT)
*Organization*: The Open University, Milton Keynes, UK
*References*: <g6c9e5$c1d$1@smc.vnet.net>
HO JEE HOU wrote:
> I have an expression which I wish to put it in the form of Cos[a x - b].
> However when I input it to Mathematica, it automatically converted to
> Cos[b - a x]. Similarly, for Sin[a x - b] it would become -Sin[b - ax].
>
> I understand that both are equivalent, but I just wish to have the form
> of Cos[a x - b]. Is there any way to do this?
You could use *HoldForm[]* to keep the expression as you typed it. For
instance,
In[1]:= Cos[a x - b] // HoldForm
Out[1]= Cos[a x - b]
In[2]:= Sin[a x - b] // HoldForm
Out[2]= Sin[a x - b]
See,
http://reference.wolfram.com/mathematica/ref/HoldForm.html
Regards,
-- Jean-Marc
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