<p>I recently got a TI-89 Titanium for my birthday, and I'm trying to get it figured out for the math level 2 subject test at the end of this year.</p>
<p>I swear I am not stupid haha, but I simply cannot figure out how to easily get the cover on and off! Is there a trick to it?! It won't just slide off.</p>
<p>I'll probably be posting more (math-related) questions when I think of them... as thick as the manual is, it isn't helping me all that much!</p>
<p>Thank you :)</p>
<p>Push. Hard. :) After a month or two of normal use, the cover should loosen up a bit. When I first got mine, my friends would laugh at me whenever I struggled to get the cover on and off. By now, it has loosened up enough that it slides easily on and off like the cover of a TI-83.</p>
<p>Don't use WD-40. Just press the cover down on both ends and slide out.
Include thumb muscles in your workout. :D</p>
<p>haha, ok thanks guys. I'm glad there isn't some button or something that I didn't see. My nails are getting all chewed up from trying to get it off XD</p>
<p>OK, another question: if you graph two functions, how can you get it to show where they intersect?</p>