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# How to find cubed root on a TI-89 calculator

How to find cubed root on a TI-89 Titanium calculator

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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)

Posted on Nov 14, 2009

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An additional way is to take the number to the 1/3 power

Posted on Nov 16, 2009

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E^((ln 8)/3) = 2
In other words, take the log of the number, divide by three and then take the anti-log of the number.

Posted on Mar 06, 2009

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Posted on Jan 02, 2017

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## Related Questions:

### Cube roots

The TI-89 does not have a cube root function. However, you can calculate any root simply by raising to the reciprocal of the power. For example, to calculate the cube (third) root of 125, press
5 ^ ( 1 / 3 ) ENTER

Nov 03, 2011 | Texas Instruments TI-89 Calculator

### I have a TI-89 Titanium. How do I graph a function containing a cubed root?

For example y=x^(1/3)-x+1. Type this function and then graphing it!
See captured images

Sep 14, 2011 | Texas Instruments TI-89 Calculator

### Integrating 1/root(10-x^2) from -root(10) to root(10) gives pi on the TI-89 but gives undefined on the platinum TI-89. Why and is there a way to make it work on the platinum?

On the TI92 Plus, which has the latest OS for that machine 2.09 Advanced mathematics Software one gets the result Pi in EXACT or AUTO modes and 3.1415926536 in APPROXIMATE mode.
However when in EXACT/AUTO mode the calculator displays a warning message Memory Full, Simplification may Not Be Complete. (see screen capture.)

On the Voyage 200 PLT with OS version 3, the same as on the Titanium (not Platinum), I get an undefined result in EXACT MODE and 3.1415926536 in APPROXIMATE MODE.

So you can get the approximate value of the integral on the Titanium or the indefinite integral which you can evaluate between the two boundary points.

Apr 30, 2011 | Texas Instruments TI-89 Calculator

### Ti-89 titanium

Having gone over a month with no response, I assume this is no longer a problem.

Jun 26, 2010 | Texas Instruments TI-89 Calculator

### How do you get the calculator to read cube root of

Welp on a Ti-93 using the 2nd function click on the function look for the cube root function barring that look for the x root function you can make the x any number root

Dec 07, 2009 | Texas Instruments TI-89 Calculator

### Cube roots on ti89

The TI-89 has one function to find whatever root you want of a number.

To find the cubed root of say...64, you would type:

root(64,3)

Sep 15, 2008 | Texas Instruments TI-89 Calculator

### Taking cubed roots

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!)

Aug 27, 2008 | Texas Instruments TI-89 Calculator

I have a TI-89 Titanium and I have experienced the same problem. HERE IS HOW TO FIX IT:

Goto " MODE " and scroll down the options until you get to
" COMPLEX FORMAT " change that option to " RECTANGULAR " and press ENTER until you exit out of the " MODE " screen. (very important that you press ' enter ' until you exit because if you don't, it will not save your changes. )

Sep 19, 2007 | Texas Instruments TI-89 Calculator

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