# Griffiths, Introduction to Electrodynamics, 4th Edition

## Chapter 01. Vector Analysis

### Problem 1.3 Property of the dot product

##### The problem asks you to
• find the angle between the body diagonals of a cube.
##### You should know about
• the dot product of vectors and its property.

$\vec{A} \cdot \vec{B} = AB \cos \theta$