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October 13th, 2007, 07:18 PM  #11 
Joined: Nov 2006 From: I'm a figment of my own imagination :? Posts: 848 Thanks: 0 
If a calculator had a color screen, it would almost certainly be more expensive than an otherwise comparable calculator with a blackandwhite screen. Why do you ask for a feature that would raise the price, while in the same breath complaining about a calculator with other added features being expensive?

October 13th, 2007, 08:03 PM  #12 
Joined: Sep 2007 Posts: 7 Thanks: 0 
I actually have 2 calculators. One is an old TI83 since things like TI89 are banned in Trig, but starting in Calculus they are allowed. My TI83 I bought off craiglist for $20. My TI89 is a titanium, and I got it for about $160 at Best Buy. I bought the 89 by mistake, but figured since I will need it in the future I did not return it. It's a really nice calculator. 
October 13th, 2007, 08:23 PM  #13 
Senior Member Joined: Sep 2007 From: USA Posts: 257 Thanks: 27 Math Focus: Calculus 
I have the TI89 previous to the titanium, using OS version 2.09. I already have a color graphing program called Derive 6. Unfortunately, TI has stopped the Derive line and don't support it anymore.

October 14th, 2007, 06:11 AM  #14  
Joined: Dec 2006 Posts: 1,111 Thanks: 0  Quote:
"Yeah, I went out to buy a Ford sedan, but I accidentally bought a Porsche instead. I thought it might come in handy later on, though, so I kept it." Or something like that.  

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calculator, enter, graph, sin2x 
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