Eddie's Math and Calculator Blog

HP Prime and TI-84 Plus:  Forward Intersection Introduction The program FORDINT calculates the third point on a triangle where the...

TI-84 Plus:  Modulo  (Jack Kesler) The program MODULO calculates the modulus for two numbers.  The program loops, allowing for additio...

TI-89 and HP Prime:  Approximation Digits of π to Lots of Digits  Ways to find digits of π .  Four steps with a calculator with CA...

Link:   https://www.youtube.com/watch?v=yD-7Z60AZfQ Mathematical Curves graphed on the HP Prime Virtual Calculator. The curves are: * Spi...

Video:  TI-55 III Integration Demo Link:   https://www.youtube.com/watch?v=YLYJYX3EHd4&feature=youtu.be This blog is property of Ed...

Link:   https://edu.casio.com/download_service/en/download/index.html I found out that this version has been around since December 2015. ...

TI-84 Plus CE:  Updated Stopwatch and Timer Programs The programs STOPW52 and TIMER52 are updates of STOPWTCH and TIMER programs respe...

TI-84 Plus CE Update:  OS 5.2 There is a new OS for the TI-84 Plus CE:  5.2.1.0042.  Many thanks to Rich Grubbs who emailed me about t...

HP Prime and Casio Prizm:   Orthogonal Matrix Test For the square matrix M, it is orthogonal when either of the following conditio...

(Maybe Not So Well Known?) Mathematical Curves Here are some mathematical curves graphed on the Desmos website ( https://www.desmos.co...