Search found 124 matches

Hi KrazyKaveman,

I do not believe that is possible. However, you might try some workarounds.

Create a help() function that displays the functions and expected parameters when you pass in your c ...

Hi davetheant,

I don't know of a way to show graphs from multiple graphing modes at the same time on the TI-89. However, you could try some workarounds.

For instance, you could try saving an im ...

Hi Marco,

Just to add an update. I experimented with plugging in the answers you expected into the original equations. I get a different answer than the equations, meaning the answer you are expe ...

Hi Marco,

Solving complex number equations should be no problem for the TI-89. I tried the problem myself using the built-in csolve (complex solve) function:

csolve((4+2i)x + ( ...

Hi idahoskeeter,

There is some basic information about programming on the site here:

http://www.ti-89.org/programs.html

Also, there is a link on that page to the TI-89 Programmer's reference. ...

Hi SWANSON,

Try entering it like this:

solve( a / b <= 0, x) | a = (3x-1)(4x+5) and b = (x+7)(1-2x)

Sometimes breaking up the problem into pie ...

Hi fabliftedranger,

You might have better luck with DoorsOS. Look at the games how-to page here:

http://www.ti-89.org/gamesfaq.html

Hope this helps!

Regards,
~ mellamokb

Hi lordb,

In normal FUNCTION graphing mode, you can't graph a line in terms of x. However, in PARAMETRIC mode (
xt1 = n
yt1 = t

You can also graph a function in the form of y = f(x) in pa ...

Hi thatguy69,

It looks like you can't solve for an undefined local variable. Try using another variable name for the one being solved. For instance, the first expression would look something like ...

Hi ghost ROM,

I just might add, that it might be easier to run your program in a separate folder, and forget about trying to define local variables. Allow the variables to be global, and if they a ...

Hi redmann11,

I think you need a matching EndFor for your For loop. My guess would be it belongs just above the statement that reads

Disp "simpson rule"

Hope this helps!

Regards ...

Hi MadMax,

When doing approximations on a TI-89, e gets evaluated as part of the expression, as though it were the number 1.7281828..., instead of some variable or function. If you enter in exact ...

Hi panzerbase,

The TI-89 should be able to simplify your trig expression if it has a readily-available simpler form. Verify that you are in Radian mode (MODE -> angle), as that sometimes makes ...

Hi santinofil,

What mode is your calculator in (MODE -> Exact/Approx)? In exact mode it won't evaluate decimal roots.

You can also get a decimal result by pressing DIAMOND+Enter.

Hope thi ...

Hi hand.jamie,

You can specify multiple variables using "and":

x-y|x=1 and y=2

Hope this helps!

Regards,
~ mellamokb