This week we learned more on Chapter 12. Woohoo.
One thing I remember clearly is finding the magnitude.
ex. u = <8,3>
Find [u] <-- That's supposed to be an absolute value sign but my laptop doesn't have them.
sqrt(8^2 + 3^2)
= sqrt(73)
And dot product, that's always fun.
ex. <1,3> x <7,4>
* Multiply across and add.
7 + 12 = 19
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