Casio fx-991ZA PLUS II User Manual

Specifying the Complex Number Format
To specify this
complex number
format:
Perform this key operation:
Rectangular
Coordinates
(SETUP) (CMPLX) (a+bi)
Polar Coordinates
(SETUP) (CMPLX) (r∠θ)
Specifying the Stat Format
Specifies whether or not to display a FREQ (frequency) column in the
STAT Mode Statistics Editor.
To specify this: Perform this key operation:
Show FREQ Column (SETUP) (STAT) (ON)
Hide FREQ Column (SETUP) (STAT) (OFF)
Specifying the Table Format
Specifies whether to use function f(x) only or the two functions f(x) and g(x)
in the TABLE Mode.
To specify this: Perform this key operation:
f(x) only (SETUP) (TABLE) (f(x))
f(x) and g(x) (SETUP) (TABLE) (f(x),g(x))
Specifying the Auto Power Off Setting
You can specify a trigger time of 10 minutes or 60 minutes for Auto Power
Off.
To specify this: Perform this key operation:
10 Minutes (SETUP) (APO) (10Min.)
60 Minutes (SETUP) (APO) (60Min.)
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Casio fx-991ZA PLUS II Specifications

General

Type	Scientific Calculator
Number of Functions	552
Equation Solver	Yes
Matrix Calculations	Yes
Complex Number Calculations	Yes
Integration	Yes
Differentiation	Yes
Memory	9 variables
Weight	95 g
Protective Case	Yes
Display	Natural Textbook Display
Power Source	Solar and Battery