Casio fx-9860G SD - Manual (Page 110)

20050401
2-6-3
Complex Number Calculations
k k k k k Absolute Value and Argument
[OPTN]-[CPLX]-[Abs]/[Arg]
The unit regards a complex number in the form a + bi as a coordinate on a Gaussian plane,
and calculates absolute value Z and argument (arg).
○ ○ ○ ○ ○
Example To calculate absolute value ( r ) and argument (
θ) for the complex
number 3 + 4 i , with the angle unit set for degrees
AK3(CPLX)2(Abs)
(d+e 1( i ))w
(Calculation of absolute value)
AK3(CPLX)3(Arg)
(d+e 1( i ))w
(Calculation of argument)
k k k k k Conjugate Complex Numbers
[OPTN]-[CPLX]-[Conj]
A complex number of the form a + bi becomes a conjugate complex number of the form
a – bi .
○ ○ ○ ○ ○
Example To calculate the conjugate complex number for the complex number 2
+ 4
i
AK3(CPLX)4(Conj)
(c+e 1( i ))w
# The result of the argument calculation differs
in accordance with the current angle unit
setting (degrees, radians, grads).
Imaginary axis
Real axis