6–6 Entering and Evaluating Equations
Parentheses in Equations
You can include parentheses in equations to control the order in which operations
are performed. Press
|]
and
|`
to insert parentheses. (For more
information, see "Operator Precedence" later in this chapter.)
Example: Entering an Equation.
Enter the equation r = 2
×
c
×
cos (
t – a)+25
Keys: Display: Description:
|H
#/)º
π
º:º
Shows the last equation used in
the equation list.
L
R
|d
/¾
Starts a new equation with
variable
R.
2
/
_
Enters a number, changing the
cursor to "_".
zL
C
z
/ºº¾
Enters infix operators.
R
/ºº 1¾
Enters a prefix function with a
left parenthesis.
L
T
L
A
|`
25
º 1!.2-
_
Enters the argument and right
parenthesis.
/ºº 1!.2
Terminates the equation and
displays it.
|
/
/
Shows its checksum and length.
Leaves Equation mode.
Displaying and Selecting Equations
The equation list contains the equations you've entered. You can display the
equations and select one to work with.
To display equations:
1.
Press
|H
. This activates Equation mode and turns on the EQN
annunciator. The display shows an entry from the equation list:
