1.07
Complex Numbers
from College Algebra: One Step at a
Time ©
1996-2011
P. 97-108
Dr. Robert J. Rapalje, Retired
Seminole State College of Florida
ANSWERS TO ALL EXERCISES ARE INCLUDED AT THE
END OF THIS PAGE
Graphing Calculator
You may be interested
to know that calculators can be used to perform operations on complex
numbers. In particular, the following steps (or precautions!) apply to the
TI83/84.
Step 1:
Make sure that the calculator is set for
complex numbers. You do this by pressing the MODE button at the top of the
second column on the calculator. Scroll down to the line that says [REAL
a+bi
re^θi].
Highlight the [a+bi].
Press [ENTER] to
lock it in. Press [CLEAR]
to exit.
Step 2:
Locate the [i]
button just above the [.]
key. Press [2nd]
[.] in order to
enter the [i].
Step 3:
When
calculating, be careful to use parentheses around the complex numbers,
especially when multiplying and dividing.
ANSWERS 1.07
p. 98:
p. 100-108:
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