# Math question

Show 80 post(s) from this thread on one page
Page 2 of 2 First 12
• 09-30-2002
BMJ
Ok, then tell me mister TI-92... can you tell if the derivative expression for
Code:

`y = sin(x^(1/2))+(sin(x)^(-1/2))`
is
Code:

`[cos(x^(1/2))]/[2x^(1/2)] + 1/[2(sin(x)^(1/2))]`
:confused:
• 09-30-2002
ober
don't test the 92 or the 89... they are massive beasts of knowledge.

And if I was home or could remember anything from any of my calc classes, I'd do that on paper.
• 09-30-2002
dbaryl
Quote:

Originally posted by BMJ
Ok, then tell me mister TI-92... can you tell if the derivative expression for
Code:

`y = sin(x^(1/2))+(sin(x)^(-1/2))`
is
Code:

`[cos(x^(1/2))]/[2x^(1/2)] + 1/[2(sin(x)^(1/2))]`
:confused:

Yup, I can, just watch ;)

Attached you'll find a screenshot of an emulater TI-92 Plus with that problem. Seems correct to me :)

As you can see, there's a MINUS and not a plus in there.
• 09-30-2002
Aran
wow, that's one whacky emu, where'd you get it from?
• 09-30-2002
dbaryl
I think this link should do it:

http://www.ticalc.org/archives/files...o/84/8442.html

although I know I found it elsewhere. Emulates anything from 82 to 92+, with the right roms. The download on that page includes all of these.

I actually own a 92 (which I hate cause of it's size) as well as a 89 and 83. I think there's no real need for the 92 in any case, 89 can do it all just as well, except for QWERTY keyboard and some memory. Plus, an emulator doesn'r really care how much "memory" you have now, does it? ;)