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# 0° Means Besties, 90° Means Strangers: The Math Behind Cosine Similarity


- **Event:** World Congress 2026 North America

## Description

Cosine Similarity is like the social network of vectors—it measures how close two points are based on the angle between them. A 0° angle? Total BFFs, perfectly aligned. A 90° angle? Complete strangers, no common ground. It’s the secret sauce behind recommendations, NLP, and clustering, helping machines figure out who’s vibing and who’s not. Math has never been so… social.

## Speaker

### [Vinod Krishnan](https://www.wearedevelopers.com/@vinod-krishnan)

Senior Engineer, Workday


## Related talks at this congress

- [Beyond Vibe Coding: Using CLI Tools as Your AI Counterpart in Pair Programming](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1721-beyond-vibe-coding) — Ron Veen
- [GitHub’s Team X-Ray: Your Repository Knows More About Your Team Than Your Team Does](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1691-github-s-team-x-ray) — Andrea Griffiths
- [AI ROI: The Hard Unit Economics of AI-Native Engineering](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1687-ai-roi-the-hard-unit) — Manu Gurudatha
- [The Agentic Engineering Loop](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1704-the-agentic) — Kevin Lin

## Watch remotely

Can’t make it to San José? Watch this session live with Pro. You also get:

- All full videos, bookmarks, and playlists
- World Congress livestreams

[See pricing](https://www.wearedevelopers.com/pricing)

## Links

- [Get tickets](https://www.wearedevelopers.com/world-congress-north-america/tickets)