Eddie's Math and Calculator Blog

Plus42: Integration in Solver The Plus42 adds an integral function to the solver engine. Just a Reminder:  Get the Plus42 App Author:  Thoma...

TI-84 Plus CE Python:  Polygon Path (ppath.py) Introduction The program PPATH: Between two points:   1.  Calculates the required leftward, c...

TI-84 Plus CE, TI-Basic and Python:  Dynamic and Goal Average   Dynamic Average The dynamic average is defined as: Σx_i / m   from i = 1 to ...

Quick TI Thoughts Calculator Succession TI-86 ->  TI-NSpire CX -> TI-NSpire CX II TI-89 -> TI-NSpire CX CAS -> TI-NSpire CX II C...

Plus42:  The FOR Function About the Plus42 App Author:  Thomas Okken App:  Android:  $9.99 iOS:  $9.99 PC/MacOS/Linux:  Free Donations Accep...

 HP 42S/DM42:   Base Programs Unsigned NOT The program UNOT applies a NOT to a binary integer (flips zeros to ones and ones to zeros) using ...

Casio fx-4000P:  Orthonormal 2D Vector Test Introduction A set of vectors form an orthonormal basis if the vectors are mutually perpendicula...

Retro Review:   Radio Shack EC-4026 Quick Facts: Model:  EC-4026 Company:  Radio Shack Equivalent Of:  Casio fx-4500P, Casio fx-4500PA Years...

Converting a Line in Parametric Line to a Function Line  From (x(t), y(t)) to y(x) Express a line, presented in parametric form: x = A * t +...

Swiss Micros DM41X and HP 41C:  Numeric Derivatives Introduction The program DFX calculates one of three types of derivative: 1.  Normal Der...