# Gudermannian function

> function that relates the circular functions and hyperbolic functions without using complex numbers

**Wikidata**: [Q1328149](https://www.wikidata.org/wiki/Q1328149)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Gudermannian_function)  
**Source**: https://4ort.xyz/entity/gudermannian-function


## References

1. Freebase Data Dumps. 2013