Has anyone tried to graph the classic surface of Revolution problems from Calculus using GC? It seems like one should be able to see the region in the x-y...
609
Chris Young
c1572young
Oct 5, 2005 8:17 am
... I'm not sure exactly what the equation your graphing here is. I got a general formula for parameterized curves out of the book "Modern Differential...
610
Chris Young
c1572young
Oct 5, 2005 8:40 am
... Here's an example with a rotating meridian: (Also posted in the Files section at Files > Calculus, Analysis > Surfaces of revolution....
611
Chris Young
c1572young
Oct 5, 2005 9:06 am
... Maybe the following is more what you wanted. It shows a revolving "slice" going around inside the surface of revolution. Also uploaded to Files > Calculus,...
612
GraphingCalcUsers@yah...
Oct 5, 2005 3:45 pm
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the GraphingCalcUsers group. File :...
613
david craig
dcraig666
Oct 9, 2005 5:03 am
Chris- You do fine work, sir. Those files you posted recently illustrating surfaces of revolution do a wonderful job of showing off Graphing Calculator....
614
Chris Young
c1572young
Oct 10, 2005 10:50 am
My latest efforts to understand parameterized 3D surfaces. Trying to keep it simple, just rotates a parabola around to form a surface of revolution and uses...
615
Chris Young
c1572young
Oct 10, 2005 11:21 am
I fixed a problem witht the latitudes not getting reset properly when the function definition was changed. You still have to figure out the inverse function to...
616
Chris Young
c1572young
Oct 10, 2005 12:30 pm
Fixed the previous file so range setting of x works right. Now you can have a hollow core in the middle as the whole thing is traced out by the profile region....
617
Chris Young
c1572young
Oct 14, 2005 1:28 pm
Here's a 3D tetrahedron in a cube, for Graphing Calculator 3.5. Shows how with some work GC can be an amazing tool for teaching solid geometry. I'm trying to...
618
Chris Young
c1572young
Oct 14, 2005 2:30 pm
A tetrahedron centered on origin, faces and edges colored to show its structure. Rotatable and translatable via sliders. Trying to figure out how to put cube...
619
Chris Young
c1572young
Oct 15, 2005 4:10 pm
Ron, Don't know if I've said so yet, but GC for OS X is an absolutely amazing piece of work! Thank you again and congratulations. I notice I can usually use...
620
Arne Landsberg
arnel@...
Oct 15, 2005 9:48 pm
I have volunteered in the middle school for several years and see GC as a way to interest and excite many students. In so keeping I have been working on a...
621
david craig
dcraig666
Oct 17, 2005 6:19 pm
I'll second Chris' comments. A local IT person asked me why I wanted GC in one of my classrooms -- which they haven't gotten around to yet, but never mind --...
622
Chris Young
c1572young
Oct 19, 2005 5:44 am
Arne, ... First, go to our web site at http://groups.yahoo.com/group/GraphingCalcUsers/?yguid=54088085 On the left you'll see the "Files" link. Click on this. ...
623
Chris Young
c1572young
Oct 19, 2005 11:47 am
Arne, Re the tip on uploading files, you're welcome. I liked your file with the cone emptying into the bin. A good realistic way to introduce volume concepts. ...
624
Chris Young
c1572young
Oct 19, 2005 11:57 am
... Well, if you check the times I posted my files, you'll see that's where a lot of my nights for the past 10 years or so have gone. Maybe GC should have a...
625
Chris Young
c1572young
Oct 19, 2005 3:03 pm
Ron and GCers: I'm still having trouble getting a shadow of the moving patch, as it "morphs" from inital position to final position. I can project a patch ...
626
GraphingCalcUsers@yah...
Oct 19, 2005 3:50 pm
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the GraphingCalcUsers group. File :...
627
Chris Young
c1572young
Oct 19, 2005 3:51 pm
I got the patch to "morph" properly. Shoud be useful for doing solid geometry demos. Also uploaded to Files > Geometry ( ...
628
Chris Young
c1572young
Oct 19, 2005 3:56 pm
Ron, I wonder whether it might be easier to not have the sliders automatically start graphing when you move them. If you've got a lot of sliders you want to...
629
Ron Avitzur
rxa31107
Oct 19, 2005 4:13 pm
... Closing the graph pane, dragging the pane divider to the bottom of the window should do that. - Ron...
630
Ron Avitzur
rxa31107
Oct 19, 2005 4:15 pm
... This is a bug which occurs because GC fails to fully expand the definitions of functions before multiplying out the matrices. You can work around it...
631
Chris Young
c1572young
Oct 19, 2005 4:17 pm
I tried it and you're right, pulling the pane divider to the bottom stops all evaluation. Thanks very much....
632
Chris Young
c1572young
Oct 19, 2005 4:25 pm
I improved the file slightly, so the old link in the "New File Uploaded" is broken. Sorry about that. Here's the replacement, which is also in the...
633
Chris Young
c1572young
Oct 19, 2005 4:29 pm
With a little work, which I'll try to do later, such as putting a picture and/or grid on the patch, it should be a pretty vivid way of illustrating different...
634
Jorge de Sousa Pires
jspxmp
Oct 20, 2005 9:31 pm
Hello Chris An interesting visualization of these three pyramids inside the cube is to illuminate the three opposite faces of a corner with light of different...
635
Chris Young
c1572young
Oct 21, 2005 8:38 am
Jorge, ... Thanks, I plan to try that, and also check out the book. Chris...
636
farouk_bonilla
Oct 25, 2005 5:16 am
I am a new GC user and I am wondering if it is possible to make slides of 3D surfaces at diferent angles other than the orthogonal ones!(i.e. y=constant or...
637
Chris Young
c1572young
Oct 26, 2005 4:38 am
Ron, I'm wondering what I'm doing wrong here. I can't seem to use a function definition and graph it in cylindrical coordinates, as shown in the attached...
