Getting started 1-29
In this example, the 
fraction precision is set 
to 6.
Complex numbers
Complex results The HP 39gs can return a complex number as a result for 
some math functions. A complex number appears as an 
ordered pair (x, y), where x is the real part and y is the 
imaginary part. For example, entering  returns (0,1).
To enter complex 
numbers
Enter the number in either of these forms, where x is the 
real part, y is the imaginary part, and i is the imaginary 
constant, :
• (x, y) or 
• x + iy. 
To enter i:
• press  
or
• press ,  or   keys to select Constant, 
 to move to the right column of the menu,   to 
select i, and  .
Storing complex 
numbers
There are 10 variables available for storing complex 
numbers: Z0 to Z9. To store a complex number in a 
variable:
• Enter the complex number, press  , enter the 
variable to store the number in, and press  .
45 
Z 0 
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HP 39gs English.book  Page 29  Wednesday, December 7, 2005  11:24 PM