Abstract In (Math. Slovaca 74 (2024), 1433–1444), the authors gave one-sided bounds for inequalities of hyperbolic functions. In this paper, we give double-sided bounds for those hyperbolic inequalities. We also give simpler proofs of the existing results from (Math. Slovaca 74 (2024), 1433–1444).
Malesevic et al. (Wed,) studied this question.