Casio fx-991ZA Plus - CALC and SOLVE Functions; Using the CALC Function

EN-21
CMPLX Mode Calculation Examples
(1 – i)
–1
=
1
2
1
2
+
i
B (Complex number format: a + bi)
( 1 -W(
i))E=
1
2
1
2
+
i
(1 + i)
4
+ (1 – i)
2
= – 4 – 2i B
( 1 +W(
i))6 4 e+( 1 -W(i))w= –4–2i
To obtain the conjugate complex number of 2 + 3i (Complex number
format:
a + bi)
12(CMPLX)2(Conjg) 2 + 3 W(
i))= 2–3i
To obtain the absolute value and argument of 1 + i Bv
Absolute Value: 1w(Abs) 1 +W(
i)=
'
2
Argument: 12(CMPLX)1(arg)1+W(i))= 45
Using a Command to Specify the Calculation Result
Format
Either of two special commands ('r∠ 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.
'
2
+
'
2
i = 2 ∠ 45, 2 ∠ 45 =
'
2
+
'
2
i Bv
! 2 e+! 2 eW(
i)12(CMPLX)3('r∠)= 2∠45
2 1-(∠) 45 12(CMPLX)4('a+bi)=
'
2
+
'
2
i
Using CALC
CALC lets you save calculation expressions that contain variables, which you
can then recall and execute in the COMP Mode (N1) and the CMPLX
Mode (N2). The following describes the types of expressions you can
save with CALC.
• Expressions: 2X + 3Y, 2AX + 3BY + C, A + B
i
• Multi-statements: X + Y : X (X + Y)
• Equalities with a single variable on the left and an expression including
variables on the right: A = B + C, Y = X
2
+ X + 3
(Use Ss(=) to input the equals sign of the equality.)
To store 3A + B and then substitute the following values to perform
the calculation: (A, B) = (5, 10), (7, 20)
3 S-(A)+Se(B)
s
Prompts for input of a value for A Current value of A
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