A SOLUTION TO AN OPEN PROBLEM FOR WILKER-TYPE INEQUALITIES

被引：5

作者：

Chen-Shiping ^{[1
]}

Ge-Xinyu ^{[2
]}

机构：

[1] Sichuan Trade Sch, Yaan 625107, Peoples R China

[2] Univ Chinese Acad Sci, Chengdu Inst Comp Applicat, Chengdu 610041, Peoples R China

来源：

JOURNAL OF MATHEMATICAL INEQUALITIES | 2021年 / 15卷 / 01期

关键词：

Wilker-type inequality; trigonometric function; open problem;

D O I：

10.7153/jmi-2021-15-06

中图分类号：

O29 [应用数学];

学科分类号：

070104 ;

摘要：

This paper is to solve the open problem for Wilker-Type inequality: what are the best possible for the constants c(1) and c(2) such that the double inequality c(1)x(3a) tanx < (sinx/x)(2a) + (tanx/x)(a) -2 < c(2)x(3a) tanx holds?

引用

页码：59 / 65

页数：7

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