Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1710470 | Applied Mathematics Letters | 2006 | 5 Pages |
Abstract
In this work, two refined forms of Jordan’s inequality: (a)2π+1π3(π2−4x2)+12−π216π5(π2−4x2)2≤sinxx≤2π+1π3(π2−4x2)+π−3π5(π2−4x2)2 and (b)2π+1π3(π2−4x2)+4(π−3)π3(x−π2)2≤sinxx≤2π+1π3(π2−4x2)+12−π2π3(x−π2)2 are established, where x∈(0,π/2]x∈(0,π/2]. The applications of the two results above give some new improvement of the Yang Le inequality.
Related Topics
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Authors
Ling Zhu,