Calculator Activity
COMPLEX NUMBERS
OBJECTIVE:
To calculate the modulus, the complex conjugate, and to simplify complex
expressions.
The absolute value or modulus of a complex numbers is defined as
2
2
y
x
iy
x
.
Before starting put your calculator in CPLX mode by pressing
.
1. What is the modulus of
i
2
?
STEP 1: To start the absolute value press
.
STEP 2: To enter
2
press
.
STEP 3: To enter
i
press
and then press
.
STEP 4: To determine the modulus press
.
2. What is the complex conjugate of
i
2
1
?
STEP 1: Press
.
STEP 2: To enter
i
2
1
press
.
STEP3: Press
to get the complex conjugate.
3. Simplify
i
i
6
3
2
1
STEP 1: To enter
3
2
1
i
press
.
STEP 2: To subtract press
.
STEP 3: To enter
i
6
press
.
STEP 4: To solve press
.
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