Re: Shade area between two polar curves

*To*: mathgroup at smc.vnet.net*Subject*: [mg100218] Re: Shade area between two polar curves*From*: dh <dh at metrohm.com>*Date*: Thu, 28 May 2009 06:49:40 -0400 (EDT)*References*: <gvhma6$83c$1@smc.vnet.net>

Hi Chee, try RegionPlot. Remember that Cos[t]=1/Sqrt[1+Tan[t]^2]: ============================== f[x_, y_] := 1 + 2/Sqrt[1 + y^2/x^2] > Sqrt[x^2 + y^2] && Sqrt[x^2 + y^2] > 2 RegionPlot[f[x, y], {x, 0, 3}, {y, -2, 2}] ================================= Daniel Chee Lim Cheung wrote: > Hi All > > I have plotted two graphs using PolarPlot, namely the limacon r=1+2 cos(t) > and the circle r = 2 from t = 0 to t = 2 Pi. and I wish to shade the area > inside the limacon but outside the circle. Can anyone suggest a way to do > it? > > Thanks and Regards > Chee >

**Follow-Ups**:**Re: Re: Shade area between two polar curves***From:*Murray Eisenberg <murray@math.umass.edu>