Thoughts from a 21st century educator.
In this applet, we can see visually what happens when we multiply two complex numbers (each of which has a length of 1). Vector u, and vector v are multiplied to give vector w.
Try dragging B and C, the endpoints of v and u respectively to try and see what the result of the multiplication of two complex numbers is.
[geogebra]complex_multiplication.ggb[/geogebra]
| Attachment | Size |
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| complex_multiplication.ggb | 1.31 KB |