Question about Texas Instruments TI-89 Calculator

Re: error message - Texas Instruments TI-89 Calculator Calculators

DelVar x

Posted on Sep 14, 2009

Re: error message

Please can anyone tell me student learning outcomes for area and volume ?

Posted on May 22, 2013

Re: error message

**Dimension** error meaning that a list or matrix index is not valid. For example, if the list {1,2,3,4} is stored in L1 then L1[5] is a dimension error because L1 only contains four elements. Finally, it is easy to solving your problem. See captured images

Posted on Mar 11, 2012

If you're in the MATHPRINT mode, press

2ND [COS^-1] ( 8 - 3 2ND [sqrt] 2 1 right-arrow ) / 2 5 ENTER

If you're in the CLASSIC mode, press

2ND [COS^-1] ( 8 - 3 2ND [sqrt] 2 1 ) ) / 2 5 ENTER

In either case you should get an answer of about 103.

2ND [COS^-1] ( 8 - 3 2ND [sqrt] 2 1 right-arrow ) / 2 5 ENTER

If you're in the CLASSIC mode, press

2ND [COS^-1] ( 8 - 3 2ND [sqrt] 2 1 ) ) / 2 5 ENTER

In either case you should get an answer of about 103.

Apr 27, 2013 | Texas Instruments TI-84 Plus Calculator

Nothing's wrong, your calculator is giving you the cosine of 42 radians. If you want the cosine of 42 degrees (which is 0.74314), press MODE, down-arrow to the "Angle" line, press right-arrow, select "2:DEGREE", and press ENTER twice.

Dec 13, 2012 | Texas Instruments TI-89 Calculator

Well it is just a calculator, it cannot do all the possible integrals you might think of. You may try to help it a bit by using the usual techniques that you were taught to transform the integral into another it might be able to find: change of variables, integration by parts. You cannot let the success on your AB or BC exam depend solely on the calculator.

May 09, 2012 | Texas Instruments TI-89 Calculator

Press** left** and **right** arrow and **2nd** keys simultaneosly, hold it and then press **ON**. Release all keys at the same time and you will reset TI 89 Titanium

Feb 27, 2012 | Texas Instruments TI-89 Calculator

I do not know the program you installed, so I will skip the part.

As to the derivative of the sine function, your result is correct if the angle unit is degree.

d(sin(x))/dx = cos(x) is true only if the angle unit is the radian. In degrees, you would have a factor Pi/180 which is 0.174532925. I suggest you consult a calculus book to understand where that factor comes from.

As to the derivative of the sine function, your result is correct if the angle unit is degree.

d(sin(x))/dx = cos(x) is true only if the angle unit is the radian. In degrees, you would have a factor Pi/180 which is 0.174532925. I suggest you consult a calculus book to understand where that factor comes from.

Mar 17, 2011 | Texas Instruments TI-89 Calculator

The sine of ten radians is -0.544021. If you want the sine of ten degrees or of ten grads, press MODE, down-arrow to Angle, press right-arrow, and select the angular mode you want. Press ENTER to save the change.

Oct 24, 2010 | Texas Instruments TI-89 Calculator

I have answered many questions asked by teachers and professors, and very few, if any, deigned to rate the posts. Why do I set myself up for yet another disappointment: I just like to help.

Anyway, the most common source of errors with computation of trigonometric functions is the angle unit. On Ti 83/84Plus (SE) calculators there are two angle units: the degree and the radian.

To verify which angle unit is set as default on a calculator, press MODE. You will see the following screen. The relevant line is the 3rd. On the screen RADIAN is highlighted, meaning that all angle values you feed to trigonometric functions are interpreted as radian measures.

Similarly, all values returned by inverse trigonometric functions are in radians.

I do not know what grades you teach, but if you are doing any differential calculus, the only appropriate unit is the radian. Only for the radian unit is the derivative of sin(x) equal to -cos(x). For the degree, you must introduce a factor to adjust (as a change of variable).

Set all your calculators to use the angle unit you are using in your teaching, and there will be no unexpected results.

Anyway, the most common source of errors with computation of trigonometric functions is the angle unit. On Ti 83/84Plus (SE) calculators there are two angle units: the degree and the radian.

To verify which angle unit is set as default on a calculator, press MODE. You will see the following screen. The relevant line is the 3rd. On the screen RADIAN is highlighted, meaning that all angle values you feed to trigonometric functions are interpreted as radian measures.

Similarly, all values returned by inverse trigonometric functions are in radians.

I do not know what grades you teach, but if you are doing any differential calculus, the only appropriate unit is the radian. Only for the radian unit is the derivative of sin(x) equal to -cos(x). For the degree, you must introduce a factor to adjust (as a change of variable).

Set all your calculators to use the angle unit you are using in your teaching, and there will be no unexpected results.

Mar 09, 2010 | Texas Instruments TI-84 Plus Silver...

This link should help you out...

http://education.ti.com/educationportal/sites/US/productDetail/us_os_89titanium.html

http://education.ti.com/educationportal/sites/US/productDetail/us_os_89titanium.html

Apr 22, 2009 | Texas Instruments TI-89 Calculator

1) Update the OS from the TI site.

2) check if button is sticking(not necessarily just the plastic button, but what it hits on the inside... you can clean the contacts on the inside of the calc with a Q-tip and rubbing alcohol.)

I don't have much experience with this specific calculator but those are my best bets.

good luck

-Saik0Shinigami

2) check if button is sticking(not necessarily just the plastic button, but what it hits on the inside... you can clean the contacts on the inside of the calc with a Q-tip and rubbing alcohol.)

I don't have much experience with this specific calculator but those are my best bets.

good luck

-Saik0Shinigami

Oct 31, 2007 | Texas Instruments TI-89 Calculator

I'm having the same problem:(

I need to solve this urgently, i can't stand always being removing the batteries... please help me!!!

I need to solve this urgently, i can't stand always being removing the batteries... please help me!!!

Oct 16, 2007 | Texas Instruments TI-89 Calculator

710 people viewed this question

Usually answered in minutes!

×