# orth of b onto a

by darthxepher
Tags: orth
 P: 59 1. The problem statement, all variables and given/known data Show that vector orth of b onto a=b-proj of b onto a is orthogonal to a. I totally don't know where to start :( and I don't know hat orth of b onto a means...
Do you remember what the dot product ($\vec a \cdot \vec b$) meant geometrically?