Sharp EL-9650, Operation Manual, Page: 79 / 373

69
MANUAL CALCULATIONS
6. Calculations Using Complex Numbers
• To execute calculations using complex numbers, select
sub-menu item [4 x ± yi ] or [5 r
θ
] within [F ANSWER]
in the SET UP menu screen.
Ï F 4
or
5
• The initial screen for the complex number calculation
mode is the same as for the real number mode.
• Complex numbers can be noted using either [4 x ± yi ] : (rectangular coordinates) or
[5 r
θ
](polar coordinates).
(1) Usable function keys (main unit keys) in the complex
number mode
The following functions can be used for complex numbers. There are no limits for
calculations using real numbers:
x 2 , x -1 , log, In, 10
x
, e
x
, a b , ,
<Example>
Calculate “(3+4i)
×
(4–6i)”.
1. Press
Ï
and check to see that the second line
from bottom of the right in the set contents screen displays “x±yi”.
To change the setting to “x±yi”, press
Ï
F 4
.
2.
Press
(
3
+
4
Ï . )j
(
4
-
6
Ï . ) ®
.
* It is possible to input complex numbers (i) in the real number
mode (real). However, an error is returned when pressing
®
.
yi
θ
r
x