It is easy to graph an equation like y=3x^2+2x-7

as shown in the newbie guide. Is there a similarly

easy method for graphing parametric equations

like x= cos(2t), y=sin(t)?

In reply to joel robbin
Thursday, 27 March 2008, 7:23 PM

### Re: graph parametric equations

by Michael Gage -
You can plot parametric equations as well. For examples see:

http://webwork.maa.org/doc/cvs/pg_CURRENT/lib/VectorField.html

and

http://webwork.maa.org/doc/cvs/pg_CURRENT/lib/WWPlot.html

Not everything is well documented so looking at the actual code in those files will help has well.

Here is a directory of problems that use the files:

rochesterLibrary/setDiffEQ2DirectionFields/ur de 2 1-

/ur de 2 1.pg

or

http://cvs.webwork.rochester.edu/viewcvs.cgi/database_problems/Rochester/setDiffEQ2DirectionFields/?cvsroot=Arizona+State+University

hope this helps.

Mike

http://webwork.maa.org/doc/cvs/pg_CURRENT/lib/VectorField.html

and

http://webwork.maa.org/doc/cvs/pg_CURRENT/lib/WWPlot.html

Not everything is well documented so looking at the actual code in those files will help has well.

Here is a directory of problems that use the files:

rochesterLibrary/setDiffEQ2DirectionFields/ur de 2 1-

/ur de 2 1.pg

or

http://cvs.webwork.rochester.edu/viewcvs.cgi/database_problems/Rochester/setDiffEQ2DirectionFields/?cvsroot=Arizona+State+University

hope this helps.

Mike

In reply to joel robbin
Friday, 28 March 2008, 7:58 AM

### Re: graph parametric equations

by Gavin LaRose -
Hi Joel,

Another resource is the WeBWorK Documentation Wiki, http://webwork.maa.org/wiki/Main_Page. Graphing parametric equations is one of the topics on the Index of Problem Techniques in the Authors' section, at http://webwork.maa.org/wiki/Category:Problem_Techniques.

Gavin

Another resource is the WeBWorK Documentation Wiki, http://webwork.maa.org/wiki/Main_Page. Graphing parametric equations is one of the topics on the Index of Problem Techniques in the Authors' section, at http://webwork.maa.org/wiki/Category:Problem_Techniques.

Gavin