Two double-angle formulas of generalized trigonometric functions
arXiv:1904.09880 · doi:10.1016/j.jat.2019.105322
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.
7 pages