juniorUnsupervised Learning
What is cosine similarity in clustering?
Updated May 15, 2026
Short answer
Cosine similarity measures angle between vectors.
Deep explanation
It is useful for text and high-dimensional sparse data.
Real-world example
Document similarity in search engines.
Common mistakes
- Confusing cosine similarity with Euclidean distance.
Follow-up questions
- When to use cosine similarity?
- What is range?