<p>How do you calculate determinants of matrices? </p>
<p>How do you multiply matrices? </p>
<p>Thanks! Feel free to contribute</p>
<p>I might end up needing assistance as well; my TI-89 just came in the mail today.</p>
<p>Go to catalog, hit d, find det</p>
<p>to enter matrices</p>
<p>[6,7,8;6,7,8;6,7,8]
Brakcets are start and beginning and commas separate numbers within rows and semicolons separate rows. multiply just multiply two matrices</p>
<p>Entropy… where is the bracket? Or do you mean parenthesis? and where is the semicolon? Gawd… lol. Thanks though.</p>
<p>How do I calculate Standard Deviation using Ti 89?</p>
<p>Ok another big Q. How do I plot data to create an equation for linear/quadratic regression?</p>
<p>I tried det(1,2;3,4) but it did not work. it says missing )</p>
<p>Nvm got it to work: det([1,2;3,4])</p>
<p>Bump!!!</p>
<p>How do you graph a function or solve an equation with both x and y on the right side?</p>
<p>I plugged in <a href=“the%20absolute%20value%20function%20of%20X%20minus%20piecewise%20function%20minus%20half”>X - [|X|] - 1/2</a>. for graphing, but nothing showed up. Why?</p>
<p>how do you do a log without a base of 10?</p>
<p>change of base formula</p>
<p>The new OS for TI-83 and 84 has a function that you can use to do logs of any base. I would assume that that feature is available somewhere on the TI-89 because of that.</p>