When in 3D Graphing mode, what equation will make the graph shown on the calculator at the below link? http://education.ti.com/us/product/tech/89/features/features.html

e^{-a(x^2+y^2)}cos(b(x^2+y^2))

then play around with a and b.

[edited by - sQuid on September 19, 2002 12:29:45 AM]

Cool! I spent like a whole 6 weeks in Chem II trying to make my own formula....
Now my TI-89 can sombaro the world!! mwahahah..

on another note, I pity all people without 89s. I can''t even remember algebra now...just put it in the 89..simultaeous equations..89...diff / integrate...89...what can the 89 NOT do?



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If only my ti89 could prove math theorems... **sigh**

Ti89s are great except when your proffessors won''t let you use them. Or when you have to show your work.

The difference between us and a computer is that, the computer is blindingly stupid, but it is capable of being stupid many, many million times a second.
-Douglas Adams

quote:

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on another note, I pity all people without 89s. I can''t even remember algebra now...just put it in the 89..simultaeous equations..89...diff / integrate...89...what can the 89 NOT do?

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Ironically, I pity you for forgetting Algebra

I''ll leave you your TI89 and keep my HP48.

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sheesh
Talk about addicted to computers and unable to do a lick of real work yourself.
*pulls a sour face*

So you can do diff eq with it now, but cant do basic algera which most high schoolers can do ?

*shakes his head*

-vlion

I pity you Ti-89 owners, such a TEENY little screen, and what an icky keyboard =-(
LONG LIVE THE TI-92+ !!!

=-)

Yes, hoorah for the calculator that can''t be used on any standardized tests or in most classes... ???