View Full Version : the TI-89

ygfperson

06-12-2002, 02:29 PM

anyone heard of it? what are its features?

for AP calculus next year, i must buy a new graphing calculator. this is the one my teacher suggested. i got a TI-80 from my aunt ~7 years ago, and it's too outdated for the work i need to do. besides, i heard i can program it using assembly. so, i'm curious as to what features it has.

oh, and one other thing: does it have a c compiler?

Unregistered

06-12-2002, 02:54 PM

The only thing you need for AP Calculus is a TI-83 or TI-83+.

They are a lot cheaper and do everything you need to do, and they do it quite well.

TI-89's are quite nice, but expensive and have soo many funtions that they can be difficult to use.

The only thing that would ever cause me to get a TI89 is their ability to graph 3d functions, their ability to graph functions that are written inexplicitly, and a few other advanced calculus functions that could be done with a TI83 and a few minutes of paper work.

If you have the money and time to learn it, go ahead.

Captain Penguin

06-12-2002, 02:55 PM

Whoops, thats me ^^ (forgot to login)

Troll_King

06-12-2002, 03:24 PM

I had some problems with the TI-92, but I like the TI-85.

Cruxus

06-12-2002, 03:44 PM

I don't know whether this concerns you; but, if you are going to be taking the ACT or SAT, you might not be allowed to use a TI-89. I know that the ACT, at least, forbid the TI-89 or anything from the TI-9x series for the mathematics section of the test. I have a TI-86 (similar to a TI-85), and it includes several advanced calculus features that I don't even use :p. A TI-83 Plus would probably work well enough; it's programmable in a Basic-like language and a form of Z80 assembly (just like most other graphing calulators in the TI-8x series); and, what's better, you'll be able to find more calculator games for it ;).

On the other hand, your teacher knows more about the class she is teaching than any of us do, so maybe it would be better to get the TI-89.

Unregistered

06-12-2002, 03:47 PM

Originally posted by Unregistered

The only thing you need for AP Calculus is a TI-83 or TI-83+.

They are a lot cheaper and do everything you need to do, and they do it quite well.

TI-89's are quite nice, but expensive and have soo many funtions that they can be difficult to use.

The only thing that would ever cause me to get a TI89 is their ability to graph 3d functions, their ability to graph functions that are written inexplicitly, and a few other advanced calculus functions that could be done with a TI83 and a few minutes of paper work.

If you have the money and time to learn it, go ahead.

you do not need a calculator for calculus! most universities and high shcools will not allow you to use them in the first place... calculus is mostly algebra so there is no use for a calculator

Captain Penguin

06-12-2002, 04:48 PM

Originally posted by Unregistered

you do not need a calculator for calculus! most universities and high shcools will not allow you to use them in the first place... calculus is mostly algebra so there is no use for a calculator

Lies!

Without a calculator how on earth would you figure out complicated integrals? YOU CAN'T! The only way would be to carry around a huge table of integrals, and that would be a pain (and would not always work).

I assure you, calculators are VERY important for calculus. They should only be used as tool, however, blah blah blah.

Out of curiosity, have you even taken a calculus course?

And I might add, all TI calculators WITHOUT QWERTY keyboards, can be used on AP and SAT exams.

Troll_King: Their is a reason that TI doesn't make TI-85's anymore. They had the tendency to be.. wrong, when doing certain operations. I know some people who still use them becuase they like them (like my calculus teacher), but I would not use one nowadays.

Fountain

06-12-2002, 04:48 PM

oh man, i thought the TI wotever was a TERMINATOR! I was gonna hide under my sofa!!!

Unregistered

06-12-2002, 05:33 PM

Originally posted by Captain Penguin

Lies!

Without a calculator how on earth would you figure out complicated integrals? YOU CAN'T! The only way would be to carry around a huge table of integrals, and that would be a pain (and would not always work).

I assure you, calculators are VERY important for calculus. They should only be used as tool, however, blah blah blah.

Out of curiosity, have you even taken a calculus course?

And I might add, all TI calculators WITHOUT QWERTY keyboards, can be used on AP and SAT exams.

Troll_King: Their is a reason that TI doesn't make TI-85's anymore. They had the tendency to be.. wrong, when doing certain operations. I know some people who still use them becuase they like them (like my calculus teacher), but I would not use one nowadays.

yes i have and i am in my third year in calculus(EE if you must know) now my question is if your pluggin numbers into a calculator where does the wrok come from? and complicated integrals hah you can solve them without a silly calculator...

golfinguy4

06-12-2002, 05:38 PM

Here's the deal. The TI-89 is really good for calc. The only problem is, when you use it for statistics, it is more of a pain in the ass than the ti 83/83+. It has many good features and saves you a great deal of time with its symbolic capabilities. It can also keep things in exact form instead of simplifying it out to a decimal. For example, the sin(pi/2) is the squareroot(2)/2. I like it personally.

P.S. I don't know if it is worth it pricewise. Mine was inheritted.

sean345

06-12-2002, 05:41 PM

I just took AP Calculus and I used a TI-82. It has enough features to get you through. The AP Test requires a graphing calculator as does the course. Most people in the class, though had a TI-83+.

- Sean

Captain Penguin

06-12-2002, 05:45 PM

Originally posted by Unregistered

yes i have and i am in my third year in calculus(EE if you must know) now my question is if your pluggin numbers into a calculator where does the wrok come from? and complicated integrals hah you can solve them without a silly calculator...

Without some extremely advanced integration techniques, finding the antiderivative of some functions is extremely difficult. Some are even impossible.

For example, if you use the integral to find the length of a curve, the integral that results is almost damn near impossible to do out without a calculator.

Unregistered

06-12-2002, 05:53 PM

Originally posted by Captain Penguin

Without some extremely advanced integration techniques, finding the antiderivative of some functions is extremely difficult. Some are even impossible.

For example, if you use the integral to find the length of a curve, the integral that results is almost damn near impossible to do out without a calculator.

yes this is true that is why your professors do not give you extremely difficult integrals

this is for canada so whatever...up here they believe in doing everything on paper calculators are banned from all exams...

ygfperson

06-12-2002, 06:11 PM

afaik, the ap test requires a graphing calculator. it does allow my old calc as well as the ti-89.

in terms of processor speed, and etc...

how strong is the ti-89?

is there a compiler for these calculators?

golfinguy4

06-12-2002, 07:27 PM

goto ticalc.org. There is a link there for the c programmers calc group or something like that. Processing, I think it has a 6 or 12 mhz processor. It IS legal on Sat's, and all other tests (no qwerty keyboard). It is almost just as good as the illegal 92, just no geometry software built in. You can download it though for like $30.

P.S. I found the link. It is http://tigcc.ticalc.org. Good Luck

dbaryl

06-12-2002, 08:35 PM

Does anyone know the reason that QWERTY calcs are banned from the tests? What is the real advantage of on like that, it's a pain in the butt yet still possible to type it one the regular one... also, I think that 92 has the same functions/software as the 89 just different hardware, not sure though.

Yoshi

06-12-2002, 10:23 PM

go to www.ticalc.org to found more...

Captain Penguin

06-13-2002, 05:40 AM

Originally posted by dbaryl

Does anyone know the reason that QWERTY calcs are banned from the tests? What is the real advantage of on like that, it's a pain in the butt yet still possible to type it one the regular one... also, I think that 92 has the same functions/software as the 89 just different hardware, not sure though.

It is interesting to note College Board's policy on the AP Calculus exam: the TI-89 is permitted, but not the TI-92. For them, exam question security is a large issue, and machines with a QWERTY keyboard permit fairly easy transcription of test items.

Some tests are starting to disallow the TI89, too, because of its symbolic manipulation capabilities.

Klinerr1

06-14-2002, 12:10 AM

omg, i just read every post in this, i hate seeing stuff involving school during my summer break

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