2022-01-23

How do I find the angle between two vectors in three-dimensional space?

cevarnamvu

Expert

There is a simple way to do it, which derives from the two dimensional
$\mathrm{cos}\left(\theta \right)=\frac{v\cdot u}{|v||u|}$
$\therefore \theta =\mathrm{arccos}\left(\frac{v\cdot u}{|v||u|}\right)$

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