© 2013-2017 Andrew M. (theawesomecoder61)

How to add a program to your calculator

TI-Nspire (Nspire, Nspire CAS, CX, CX CAS)

  1. Download and install TI-Nspire Computer Link. If you have a calculator that is not the CX, select the model that corresponds with yours. The program is only for Windows and Mac OS X/macOS (Linux users try Wine or VirtualBox).
  2. Download a .tns (TI-Nspire document) to your computer.
  3. Plug your calculator into an open USB port on your computer with a mini-USB cable that was included in the calculator packaging or one laying around in your dwelling.
  4. Open TI-Nspire Computer Link, select your calculator, and drag in the downloaded .tns into the bottom file list.

TI-84 (83+, 84+, 84+SE)

  1. Instructions coming at a later time, I do not currently own an 84

Programs

M and A Finder (Factoring a trinomial)
Compatiblity:
When I took algebra in school, I learned to factor a trinominal (ex. x²+5x+6) using a method called M and A. Here is how to do it:
  1. Make a table with 2 columns and 1 row. Label the first column "M" and the second column "A".
  2. Multiply the coefficient of the first term and the last term. Put the product under the "M" column.
  3. Take the coefficient of the middle (second) term and put that under the "A" column.
  4. Think or list the factors of the number under the "M" column that add to the number under the "A" column. Take into consideration negative values.
  5. Once the two factors are found, rewrite the trinomial, replacing the middle term with the 2 factors and the variable.
  6. Factor the four terms.
​
  • Purpose
    • This program finds those 2 factors for you.
  • ​Function
    • ​ma()
  • ​Parameters
    • ​M value, any non-zero integer
    • A value, any non-zero integer
  • Global (can be accessed anywhere)
    • Yes
  • Note
    • "M" and/or "A" should never be 0, otherwise the program will return nothing.
Picture
The ma() function on a TI-Nspire CX
Picture
The MAFINDER program on a TI-84 Plus

PerErr (Percent of Error)
Compatiblity:
  • Purpose
    • This program finds the percent of error of an estimated value and the actual value.
  • ​Function
    • ​perrerr()
  • ​Parameters
    • ​estimated value, any real number
    • actual value, any real number
  • Global (can be accessed anywhere)
    • Yes
Picture
The pererr() function on a TI-Nspire CX
Picture
The PERERR program on a TI-84 Plus Silver Edition

Rainbow
Compatiblity:
Have you ever found yourself bored after a quiz or a test and wanting to look at something mesmerizing? Here you go, it's a color-changing rectangle/square with adjustable speeds. The two GIFs below use the fastest speed setting.

Note: this was designed for the CX models (CX and CX CAS, the ones with a color screen)
Picture
The entire animation & demonstrating the variable speeds
Picture
Showing off the ability to change size and the debug feature
I took all screenshots with the TI-Nspire CX Student Software and recorded all GIFs using firebird. I own a TI-Nspire CX running OS 4.2.0 and with ndless installed.