Preview: The Equation Solver - Texas Instruments TI-86 Manual Book

202
Chapter 15: Equation Solving
The menu is a
VARS EQU
menu version of the
VARS
screen (Chapter 2).
EQU
The example uses a formula
for a voltage divider.
and represent
R1 R2
resistors.
and represent voltage.
V V1
To solve for the unknown
variable in an equation on the
home screen or in the
program editor, select
Solver(
from the (A to Z
CATALOG
Reference).

Preview: The Equation Solver

With the equation solver, you can enter an expression or equation, store values to all but
one variable in the expression or equation, and then solve for the unknown variable. These
steps introduce the solver. For details, read this chapter.
Display the equation-entry editor. The
VARS EQU menu is displayed on the
bottom of the screen.
Enter an equation. When you press
b, the interactive-solver editor and
solver menu are displayed.
Enter values for each variable, except the
unknown variable R1
may have values stored to them already.
Move the cursor to the variable for which
you want to solve. You may enter a guess.
Solve the equation for the variable. Small
squares mark both the solution variable
and the equation
leftNrt=0
the equation minus the right side of the
equation). If you edit a value or leave the
screen, the squares disappear.
- t
1 ã
ä 1 ã
ã
=
1 ã
1 ã
1 ã
b
10
. Some variables
$
*
(the left side of
- t
1
ä
V 1
ä D
V
F D
ä
R 1
\
ä
R 1
E E
ä
R 2
# # #
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