Parentheses In Equations; Displaying And Selecting Equations - HP 33s User Manual

Parentheses in Equations

You can include parentheses in equations to control the order in which operations
are performed. Press
information, see "Operator Precedence" later in this chapter.)
Example: Entering an Equation.
Enter the equation r = 2
Keys:
º d
h º ¢
R
2
¸ h ¸
C
n
h à h
T A
º | Ù
25
Ï
º Î
Å

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:
º d
1. Press
annunciator. The display shows an entry from the equation list:
6–6
Entering and Evaluating Equations
º y º |
and
c cos ( t – a)+25
Display:
 

  _ 



 _ 




. This activates Equation mode and turns on the EQN
to insert parentheses. (For more
Description:
Shows the last equation used in
the equation list.
Starts a new equation with
variable R .
Enters a number, changing the
cursor to "_".
Enters infix operators.
Enters a prefix function with a
left parenthesis.
Enters the argument and right
parenthesis.
Terminates the equation and
displays it.
Shows its checksum and length.
Leaves Equation mode.