Cosine Similarity

• Cosine Similarity is used to calculate the similarity between two vectors
• Range: [-1, 1]

[!def] Cosine SImilarity
$$
\text{Cosine Similarity} = \frac{\sum_{i=1}^n A_i B_i}{\sqrt{\sum_{i=1}^n A_i^2} \sqrt{\sum_{i=1}^n B_i^2}}
$$

• -1 means opposite
• 1 means most similar
• 0 means no relation