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1.07  Complex Numbersfrom College Algebra: One Step at a Time  © 1996-2011

P. 97-108

Dr. Robert J. Rapalje, Retired

More FREE help available from my website at www.mathinlivingcolor.comANSWERS TO ALL EXERCISES ARE INCLUDED AT THE END OF THIS PAGE

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Graphing Calculator 

ou may be interested to know that calculators can be used to perform operations on comp

mbers. In particular, the following steps (or precautions!) apply to the TI83/84.

ep 1:  Make sure that the calculator is set for complex numbers. You do this by pressing t

MODE button at the top of the second column on the calculator. Scroll down to the

that says [REAL  a+bi  re^θi]. Highlight the [a+bi]. Press [ENTER] to lock it in. Press[CLEAR] to exit.

ep 2:  Locate the [i] button just above the [.] key. Press [2nd] [.] in order to enter the [i].

ep 3:  When calculating, be careful to use parentheses around the complex numbers,

especially when multiplying and dividing.

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ANSWERS 1.07 

p. 98:

p. 100-108:

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. Robert J. Rapalje, Retired  

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