Texas Instruments TI-89 Titanium Graphing Calculator: Texas Instruments. Desktop that allows easier access to apps and editors; USB port for computer connectivity. Symbolic manipulation for algebra, calculus and differential equations. Cracking the SAT Subject Test in Math 2, 2nd Edition: Everything You Need to. Anyone get calculus made easy for their TI-89? Share with: Link: Copy link. My TI-83+ has gotten me through so much in business/math/finance classes.

Download lagu stereo hearts stafaband. As it turns out, and this was mentioned the last time there was a TI article on /., a common strategy schools use is to press the reset button on the calculator, which clears out BASIC programs and whatnot. It seems, however, that the reset button does not touch the firmware -- which is why TI is probably worried about this situation. I am vehemently opposed to DRM, but I would not go as far as to claim that the companies pushing DRM want to control their users just for the sake of control. These people are not twirling their mustachios and laughing to each other about their evil plots -- they have a reason for wanting to control their users, and it almost always boils down to making money.

TI is worried about losing the only remaining market for graphing calculators, so they will go to any length, including undermining user freedoms, to try to maintain that market. I don't know anything about the nSpire, but my TI-89 has a few different ways of resetting it, some more pervasive than others.

The most common key-sequence results in the appearance of a progress-bar thingy for a few seconds, and the UI reverts to the default, and programs, expressions or variables assigned to general memory are deleted. However, programs (user-generated or otherwise) assigned to so-called 'archive' memory are not deleted, so a simple script to restore your favourite settings is easy enoug. The nspire is actually pretty freaking smart about resetting. Instead of actually needing to do a full reset, it has a fancy test-taking mode. You hold down the escape+home(on) key while the calculator is turned off, then you'll get a dialogue asking if you want to enter 'press to test' mode.

Once you enter that mode, the calculator resets, and reloads the firmware without deleting anything you've been working on, and a little led on the end of the calculator will blink every few seconds to show that you're. My math teacher would prohibit us from using our own calculators on tests. He had a set of calculators that he kept for when we had tests, and he would hand them out--blanked--and we had to write our own programs on them in the 30mins before the test. His thought was if you could memorize your program to type it out before the test, you deserved to use it on the test.

However, most of the students used the extra time to just do the test manually because it really wasen't smart to spend the time on typing ou. There's a really easy solution to the cheating problem, and it wouldn't even require TI to do anything different: have the school provide calculators for use during a test. If the school bought 60 calculators, they would ensure they are clear of any programs, hand them out before the test and collect them with the test.

If students cheat on homework, it'll be easily reflected when they don't know how to solve the problems on the test. To prevent student's from looking at previous tests online, use differe. Just to clear this up, pressing the reset button is never sufficient. At least on the Ti-83 and 84, there was a program that is run from a second known secure calculator that will cause an unknown calculator be wiped clean. It is well known that the 'reset' is incomplete and can be trapped. If this is not done, to all unknown calculators, then it might be argued that the school is not worried about calculators.

What we do, and the only secure method I can think of, is to supply ramdom calculators. Who the hell needs a graphing calculator on a standardized test? Why do standardized tests allow them at all? Hell, at the level of middle and high school standardized tests, you needn't even a calculator at all. I just graduated with a B.S. In Physics, and all but a very, very few times did we ever need calculators; tests were done with abstract variables, as you don't need numbers to show that you understand how to solve a problem. And if you must absolutely have a calculator for a test, I can think of abs.