# Math 21a Fall 2019

## Multivariable Calculus

# Dot product in Machine Learning

The dot product formulacos(α) = v w/(|v| |w|)appears in many different context. For example, as correlation between data. See section 2.3.2.3 in a machine learning book:

cos(α) = v w/(|v| |w|)appears in many different context. For example, as correlation between data. See section 2.3.2.3 in a machine learning book: