Saturday, November 13, 2021

TI-92 Plus: Solving Problems Step by Step

 TI-92 Plus:  Solving Problems Step by Step


This program should work with the TI-89 family (TI-89, TI-89 Titanium, Voyage 200).  





Some CAS Tricks Used


With the help of the TI-89/92 Plus manual and adding restrictions with the with ( | ) command:


ln(x^y) | x>0 and y>0 returns x


expand(ln(x∙y)) | x>0 and y>0 returns ln(x)+ln(y)


sin^-1(sin(x)) | x≥-π/2 and x≤π/2 returns x


tan^-1(tan(x)) | x≥-π/2 and x≤π/2 returns

(mod(2∙x-π,2∙π)/2) - π/2


√(x^2) | x≥0 returns x


Also, the part command can be used to pick out parts of an equation or expression.  Using left and right can extract sides of an equation.


Example:


left(2∙x+5 = 3∙y) returns 2∙x+5


right(2∙x+5 = 3∙y) returns 3∙y


TI-92 Plus Program: steps


The equations offered in this program are:


a∙x+c = b

a∙x+b = c∙x+d

a∙x^2 + c = b

y = a∙b^x

√(a∙x+c) = b∙x+d

x^2+(2∙a)∙x = b

1/x+1/a = 1/b

sin(a∙x)∙cos(a∙x) = b



Click on the picture below for the code:




Or you can download the file (.9xf) here:


https://drive.google.com/file/d/1c0DN8gkH_9jWWpSniilsZoYfOs9EBu7v/view?usp=sharing



Take care,


Eddie 



All original content copyright, © 2011-2021.  Edward Shore.   Unauthorized use and/or unauthorized distribution for commercial purposes without express and written permission from the author is strictly prohibited.  This blog entry may be distributed for noncommercial purposes, provided that full credit is given to the author. 


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