Operation Manual

Chapter 2: Math, Angle, and Test Operations 48
2. Enter the expression in any of three ways.
• Enter the expression directly into the equation solver.
• Paste a Y= variable name from the
YVARS shortcut menu (t a) to the equation solver.
• Press yK, paste a Y= variable name from the YVARS shortcut menu, and press Í. The
expression is pasted to the equation solver.
The expression is stored to variables E1, E2 (MathPrint™ mode) or eqn (Classic mode) as you enter
it.
3. Press † (MathPrint™ mode) or Í (Classic mode). The interactive solver editor is displayed.
• Variables in the equation are listed in the order in which they appear in the equation. Any
values stored to the listed variables also are displayed.
• The default lower and upper bounds appear in the last line of the editor
(
bound={L1â99,1â99}).
•A $ is displayed in the first column of the bottom line if the editor continues beyond the
screen.
Note: To use the solver to solve an equation such as K=.5MV
2
, enter eqn:0=KN.5MV
2
(Classic mode) or
K=.5MV
2
(MathPrint™ mode), in the equation editor.
Entering and Editing Variable Values
When you enter or edit a value for a variable in the interactive solver editor, the new value is stored in
memory to that variable.
You can enter an expression for a variable value. It is evaluated when you move to the next variable.
Expressions must resolve to real numbers at each step during the iteration.
You can store equations to any
VARS Y-VARS variables, such as Y1 or r6, and then reference the
variables in the equation. The interactive solver editor displays all variables of all Y= functions recalled
in the equation.
MathPrint™
Classic The equation stored in
eqn is set
equal to zero and displayed on the
top line.