Abstract
We give new lower bound and upper bound for Papenfuss-Bach inequality and improve Ruehr-Shafer inequality by providing a new lower bound.
Citation
Zhengjie Sun. Ling Zhu. "Some Refinements of Inequalities for Circular Functions." J. Appl. Math. 2011 1 - 9, 2011. https://doi.org/10.1155/2011/869261
Information
Published: 2011
First available in Project Euclid: 15 March 2012
zbMATH: 1235.26017
MathSciNet: MR2854960
Digital Object Identifier: 10.1155/2011/869261
Rights: Copyright © 2011 Hindawi
