Knowledge Base

Solution 12150: Multiplication of Complex Numbers in Polar Form on the TI-89 Family, TI-92 Family and Voyage™ 200 Graphing Calculators.

How do I multiply complex numbers in polar form on the TI-89 family, TI-92 family, and Voyage 200 graphing calculators?

The following example demonstrates how to multiply two complex numbers in polar form.

Example:

Multiply (45Ð30) by (45Ð-30).

1) Press [(] [4] [5].
2) Press [2nd] [Ð].
3) Press [3] [0] [)] [x] [(] [4] [5].
4) Press [2nd] [Ð].
5) Press [(-)] [3] [0] [)].
6) Press [ENTER].

For additional instructions and examples on performing these types of calculations, refer to the online guidebook for your calculator model.