:PROPERTIES: :ID: 2e93183b-8d9c-4dca-9835-0999d4e0b29d :mtime: 20231010011902 :ctime: 20231010011840 :END: #+title: vector projection #+filetags: :public:project: * Definition Let's say we want to know the components of [[id:5864974d-0edf-4757-9b1f-31b159c9aa7a][Vector]] $\vec{a}$ in the direction of $\vec{b}$. It can be given by $\vec{a} \cdot \hat{b}$.