Question about Texas Instruments TI-84 Plus Silver Edition Graphic Calculator
Open the Matrix function by pressing 2nd [x^-1]>EDIT.
Once Matrix is created, press [2nd][x^-1]>MATH>[1:det(] complete the matrix name and then press ENTER. If matrix is non-singular, you will get your answer.
Posted on Nov 30, 2012
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Posted on Jan 02, 2017
Have you tried 2nd then down arrow. This adjusts the brightness of the screen. You may need to repeat it a few times (you must release the 2nd key, you cannot just hold it down and type the down arrow many times).
Posted on May 16, 2008
SOURCE: TI-83 Plus Silver Edition 1.14
That means that you know your calc crashed. This can be caused by taking out the batteries durring running time, happened just randomly. Well nothing to fear just press clear and it should go away but if it stays on that screen you have problems and is best to try some of these methods. Take out all the bateries and press and hold the on button for 30 seconds. Put the batteries back in and it should have reset. Warning you should archive everything incase this happens. To archive go to 2nd mem and hit enter to put a astrick next to the app (meaning archived)
Posted on Sep 16, 2008
There is nothing wrong. Your angle unit is set to radians and the calculator gave you the correct angle the cosine of which is -0.25: the answer is in the same unit as the one your calculator is configured for.
Press [MODE]. Use arrow to scroll to 3rd line, highlight Degree and press [ENTER]. Press [2nd][QUIT] to return to main calculator screen.
As long as the angle unit is set to degree, the angles calculated by the inverse trigonometric function will be in degrees.
Hope it helps.
Posted on Nov 14, 2009
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