Question about Texas Instruments TI-89 Calculator

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You can download the manual from: http://education.ti.com/downloads/guidebooks/graphing/89ti/TI-89_Guidebook_EN.pdf

On page 79, you will find:

Find log (x,b). You can enter "log" on the entry
line by typing LOG on the keyboard, or by
pressing the key with the diamond and then 7.

Press [diamond] 7 X , [alpha] b ) [ENTER]

Posted on Nov 11, 2010

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Posted on Jan 02, 2017

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SOURCE: How do I calculate the inverse log on the TI-89?

Hello,

The wrong terminology is playing tricks on you.

- If you are talking about the natural logarithms, the inverse function of the natural log is the exponential:
**ln(e^(x))=e^(ln(x)) = x** - If you are
**.**

Answer; antilog of 0.345 = 10^(0.345) =2.21309471

Look at the last two commands on the screen capture.

Hope it helps

Thanks for using FixYa

Posted on Nov 20, 2009

SOURCE: where is the log button

If you press the Alpha key twice and type in using the letters written above the keys and spell out "log()" now you can use the log function without searching for the key, then just enter whatever value you have for the function into the parentheses.

You can use the Alpha lock technique for any function in the TI's catalog

ie

nderiv()

csc()

sec()

etc.

Posted on Mar 11, 2009

SOURCE: How I can get the log base 10 number in a TI 89

"♦" "7" will give you log base 10 for the texas instuments TI-89 Titanium

Posted on Jan 06, 2010

SOURCE: How do I get my

Press diamond then ENTER to convert the display the current value in numeric form.

To get everything to display this way, press MODE F2 then scroll down to Exact/Approx, press right-arrow, press up/down select APPROXIMATE, then press ENTER. Press ENTER once again to save your settings.

Posted on Sep 01, 2010

SOURCE: where is the log button

The natural log is marked LN, the 2ND function of the X key (just below HOME on the leftmost column of the keyboard).

The common log is not marked on the keyboard but can be accessed by pressing diamond 7. You can also access it via the CATALOG and/or spell it out.

Posted on Sep 20, 2010

It ts easy to find solution for this problem. Type **int(sin(377x-1.231),x,0.299,3.94)**

See captured image below

Oct 06, 2012 | Texas Instruments TI-89 Calculator

I have no idea what type of log problems you want to solve. It does help to know what you have in mind. To type in the log function log(, you have two ways:

1. Use the keyboard to type it in on the command line APLHA L, ALPHA o, ALPHA g followed by opening parenthesis. Or if you can LOCK the alpha keyboard, lock it and press the keys corresponding to the letters l, o, and g.

**2. Press [Diamond key] [7]**

The last trick works on the TI92 and TI Voyage 200 PLT which have a full fledged keyboard. Try it anyway, if that does not work you can still use the ALPHA keyboard.

1. Use the keyboard to type it in on the command line APLHA L, ALPHA o, ALPHA g followed by opening parenthesis. Or if you can LOCK the alpha keyboard, lock it and press the keys corresponding to the letters l, o, and g.

The last trick works on the TI92 and TI Voyage 200 PLT which have a full fledged keyboard. Try it anyway, if that does not work you can still use the ALPHA keyboard.

Jul 26, 2011 | Texas Instruments TI-89 Calculator

If you want to take the log base b of x, enter it as log(x, b).

To get log, you can either type it in or press diamond 7.

To get log, you can either type it in or press diamond 7.

Nov 23, 2010 | Texas Instruments TI-89 Calculator

The natural log is marked LN, the 2ND function of the X key (just below HOME on the leftmost column of the keyboard).

The common log is not marked on the keyboard but can be accessed by pressing diamond 7. You can also access it via the CATALOG and/or spell it out.

The common log is not marked on the keyboard but can be accessed by pressing diamond 7. You can also access it via the CATALOG and/or spell it out.

Sep 20, 2010 | Texas Instruments TI-89 Calculator

Instead of just hitting enter try pushing the diamond key and enter, for the approximation function? Just a thought.

Jun 09, 2009 | Texas Instruments TI-89 Calculator

To find the cubed root (or any root) of a number, use the root() function.

If you want the cubed root of 125, you would type:

root(125,3)

If you want the cubed root of 125, you would type:

root(125,3)

Mar 06, 2009 | Texas Instruments TI-86 Calculator

"♦" "7" will give you log base 10 for the texas instuments TI-89 Titanium

Feb 20, 2009 | Texas Instruments TI-89 Calculator

Green 7

Dec 15, 2008 | Texas Instruments TI-89 Calculator

Well, heck, I can't answer that one but perhaps you can get a better response here:

http://ti-89.org/faq.html

(I'm glad I don't have to deal with this kind of stuff any more!)

http://ti-89.org/faq.html

(I'm glad I don't have to deal with this kind of stuff any more!)

Aug 27, 2008 | Texas Instruments TI-89 Calculator

There is no log (base 10) button on a TI-89. It's buried in the CATALOG as log(. As a shortcut, you can do ln(#)/ln(base), where # and base are replaced with what you want. For the inverse of a log, do the base raised to the part on the other side of the equals sign. So, log(x) = 2 would become 10^2 = x.

Jul 16, 2008 | Texas Instruments TI-89 Calculator

May 21, 2014 | Texas Instruments TI-89 Calculator

Feb 17, 2014 | Texas Instruments TI-89 Calculator

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