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Re: ComplexExpand and FontSize
*To*: mathgroup at smc.vnet.net
*Subject*: [mg9159] Re: ComplexExpand and FontSize
*From*: Paul Abbott <paul at physics.uwa.edu.au>
*Date*: Thu, 16 Oct 1997 03:38:00 -0400
*Organization*: University of Western Australia
*Sender*: owner-wri-mathgroup at wolfram.com
YLEFFLER at UCIS.VILL.EDU wrote:
> After seeing some of the questions in the news group I have one about
> the Simplify command. It doesn't seem to know DeMoivre's theorem. For example
> in trying to work with Spherical Harmonics you often want the Sin and Cos
> combinations of a +/- pair but you cannot get this without typing it in.
I think you are looking for ComplexExpand, e.g.,
In[1]:= SphericalHarmonicY[2, -1, t, p]
Out[1]=
1 15
- Exp[-I p] Sqrt[----] Cos[t] Sin[t]
2 2 Pi
In[2]:= ComplexExpand[%]
Out[2]=
1 15
- Sqrt[----] Cos[p] Cos[t] Sin[t] -
2 2 Pi
1 15
- I Sqrt[----] Cos[t] Sin[p] Sin[t]
2 2 Pi
> I have a second question about the Notebook font size. I would like to
> change it but dont know the file. I have looked in 3.0 book and in the 2.2
> Front End manual but neither seems to mention it.
There are many ways. To change all cells in a Notebook, it is best to
edit the StyleSheet (under the Format menu). Alternatively, you might
change the screen magnification or use Format/Screen Style
Environment/Presentation.
Cheers,
Paul
____________________________________________________________________
Paul Abbott Phone: +61-8-9380-2734
Department of Physics Fax: +61-8-9380-1014
The University of Western Australia Nedlands WA 6907
mailto:paul at physics.uwa.edu.au AUSTRALIA
http://www.pd.uwa.edu.au/~paul
God IS a weakly left-handed dice player
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