# Two double-angle formulas of generalized trigonometric functions

## TL;DR

This paper introduces new double-angle formulas for generalized trigonometric functions in two specific cases, expanding the mathematical understanding of these functions beyond previously known special cases.

## Contribution

The paper presents novel double-angle formulas for generalized trigonometric functions in two particular cases, filling a gap in the existing mathematical literature.

## Key findings

- New double-angle formulas established for two special cases
- Extends the mathematical framework of generalized trigonometric functions
- Provides tools for further research in generalized trigonometry

## Abstract

With respect to generalized trigonometric functions, since the discovery of double-angle formula for a special case by Edmunds, Gurka and Lang in 2012, no double-angle formulas have been found. In this paper, we will establish new double-angle formulas of generalized trigonometric functions in two special cases.