# HP F2226A - 48GII Graphic Calculator User Manual Page 246

Graphing calculator.

'a^2 = b^2+c^2-2*b*c*COS(α)'
Then, enter the number 9, and create a list of equations by using: function
LIST (use the command catalog ‚N). Store this list in the variable EQ.
The variable EQ contains the list of equations that will be scanned by the MES
when trying to solve for the unknowns.
Entering a window title
Next, we will create a string variable to be called TITLE to contain the string
"Triangle Solution", as follows:
‚Õ
~~„~
„triangle#
„solution
`
³
~~title`
K
Creating a list of variables
Next, create a list of variable names in the stack that will look like this:
and store it in variable LVARI (List of VARIables). The list of variables
represents the order in which the variables will be listed when the MES gets
started. It must include all the variables in the equations, or it will not work
with function MITM (see below). Here is the sequence of keystrokes to use to
prepare and store this list:
the variables @LVARI! !@TITLE @@EQ@@ .
'α+β+γ = 180'
's = (a+b+c)/2'
'A = √ (s*(s-a)*(s-b)*(s-c))'
Open double quotes in stack
Locks keyboard into lower-case alpha.
Enter text: Triangle_
Enter text: Solution
Enter string "Triangle Solution" in stack
Open single quotes in stack
Enter variable name 'TITLE'
Store string into 'TITLE'
{ a b c α β γ A s }
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