Trees Review

Essentially, trees are an abstraction that allow for hierarchical organization of “things”. These “things” can be anything, but when we’re learning trees they are often numbers (or letters). An abstract data type just means that it is a way of organizing data that we may use later, without care for how the abstraction is actually implemented (for example with lists, or with a class).

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Phasors and the Unit Circle

Today we’re going to confront a simple lie you learned in high school, and replace it with something more complicated.  The topic today is the unit circle. Personally, I don’t see that many uses for the unit circle, aside from teaching students how to deal with trig identities and right triangles.  But the unit circle become much more interesting when you use it to describe imaginary numbers.

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