Sunday, July 26, 2020

HP 41C, HP 42S, TI-60: Arithmetic-Geometric Mean

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HP 41C, HP 42S, TI-60:  Arithmetic-Geometric Mean Arithmetic-Geometric Mean The program AGM calculates the arithmetic-geometric mea...
Saturday, July 25, 2020

Fun with the 71B '20

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Fun with the 71B '20 Differential Equations:  Runge Kutta Method 4th Order Find a numerical solution to the differential equation: ...
Sunday, July 19, 2020

Solving Systems of Quadratic Equations

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Solving Systems of Quadratic Equations This blog entry looks at four systems of quadratic equations. In each system, A, B, C, D, E, and...
Saturday, July 18, 2020

HP 41C and HP 42S (also Free42/DM42): Random Tone Generator

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HP 41C and HP 42S (also Free42/DM42): Random Tone Generator Tones The program RTONE generates a set of random tones (0 through 9).   Si...
Sunday, July 12, 2020

HP Prime: Pythagorean Triangle Search

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HP Prime: Pythagorean Triangle Search Three Integers Make a Right Triangle A Pythagorean triple is a trio of positive integers a, b, an...
Saturday, July 11, 2020

HP 42S/DM42/Free42: GETKEY Demonstration

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HP 42S/DM42/Free42:  GETKEY Demonstration Good day everyone, hope everything is well with you today! How GETKEY Works To find the GET...
Friday, July 10, 2020

Retro Review: TI-95 Procalc

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Retro Review:  TI-95 Procalc  This review covers the calculator itself, not any of the optional accessories which includes a ...
Sunday, July 5, 2020

Casio fx-991EX and fx-115ES Plus: Velocity Conversions

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Casio fx-991EX and fx-115ES Plus: Velocity Conversions The Casio fx-991EX Classwiz and Casio fx-115ES Plus calculators, among others, hav...
Friday, July 3, 2020

Casio fx-9750GIII: Sequence of Rotated Points

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Casio fx-9750GIII: Sequence of Rotated Points Introduction The program ROTSEQ generates a 2 row matrix from the sequence: [ [ x_n+1 ]...
Sunday, June 28, 2020

Numworks Python Scripts: Basic Graphics

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Numworks Python Scripts:  Basic Graphics Script:  atari.py Draws the basic-eight color palette of the classic 1977 Atari 2600. Atar...