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
收藏
页码：59 / 65
页数：7
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