Casio fx-991ZA PLUS II - CMPLX Mode Calculation Examples; Using a Command to Specify the Calculation Result Format; Statistical Calculations (STAT)

CMPLX Mode Calculation Examples
Example 1: (1 - i)
-1
=
1
2
+
1
2
i (MthIO-MathO) (Complex number format: a
+bi)
1 (i)
1
2
+
1
2
i
Example 2: (1 + i)
2
+ (1 - i)
2
= 0 (MthIO-MathO)
1 (i) 1 (i)
0
Example 3: To obtain the conjugate complex number of 2 + 3i
(Complex number format: a+bi)
(CMPLX) (Conjg) 2 3 (i) 2-3i
Example 4: To obtain the absolute value and argument of 1 + i (MthIO-
MathO) (Angle unit: Deg)
Absolute Value (Abs):
(Abs) 1 (i)
√2
Argument (arg):
(CMPLX) (arg) 1 (i)
45
Using a Command to Specify the Calculation
Result Format
Either of two special commands (
r∠θ or a+bi) can be input at the end
of a calculation to specify the display format of the calculation results.
The command overrides the calculator's complex number format setting.
Example: √
2 + √2i = 2∠45, 2∠45 = √2 + √2i (MthIO-MathO) (Angle unit:
Deg)
2 2 (i) (CMPLX)
( r∠θ)
2∠45
2 (∠) 45 (CMPLX) ( a+bi) √2+√2i
Statistical Calculations (STAT)
To start a statistical calculation, perform the key operation
(STAT)
to enter the STAT Mode and then use the screen that appears to select the
type of calculation you want to perform.
49