Journal of Applied Mathematics (Jan 2011)

Some Refinements of Inequalities for Circular Functions

Zhengjie Sun,
Ling Zhu

Affiliations

Zhengjie Sun: Department of Mathematics, Zhejiang Gongshang University, Zhejiang, Hangzhou 310018, China
Ling Zhu: Department of Mathematics, Zhejiang Gongshang University, Zhejiang, Hangzhou 310018, China

DOI: https://doi.org/10.1155/2011/869261
Journal volume & issue: Vol. 2011

Abstract

We give new lower bound and upper bound for Papenfuss-Bach inequality and improve Ruehr-Shafer inequality by providing a new lower bound.

Published in Journal of Applied Mathematics

ISSN: 1110-757X (Print); 1687-0042 (Online)
Publisher: Wiley
Country of publisher: United Kingdom
LCC subjects: Science: Mathematics
Website: https://onlinelibrary.wiley.com/journal/4185

About the journal