# trigonometric number

> irrational number produced by taking the sine or cosine of a rational multiple of a full circle

**Wikidata**: [Q7841831](https://www.wikidata.org/wiki/Q7841831)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Exact_trigonometric_values)  
**Source**: https://4ort.xyz/entity/trigonometric-number