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New Refinements and Improvements of Jordan’s Inequality

Mathematics, 2018
The polynomial bounds of Jordan’s inequality, especially the cubic and quartic polynomial bounds, have been studied and improved in a lot of the literature; however, the linear and quadratic polynomial bounds can not be improved very much. In this paper,
Lina Zhang, Xuesi Ma
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Spatial inequality in Jordan

Journal of Economics and Management, 2019
Aim/purpose – The aim of this study is to examine the spatial inequality in Jordan, amongst Jordan’s rural and urban governorates (Muhafazat).
Sharafat Ayman Al
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Jordan-Type Inequalities and Stratification

Axioms
In this paper, two double Jordan-type inequalities are introduced that generalize some previously established inequalities. As a result, some new upper and lower bounds and approximations of the sinc function are obtained.
Miloš Mićović, Branko Malešević
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Self Image and Intersectionality in the Poetry of June Jordan [PDF]

مجلة الدراسات الإنسانية والأدبية, 2023
This paper examines the racial poetry of the African-American poet , essayist , and activist June Millicent Jordan ( 1936- 2002 ), in the light of Intersectionality theory , and how she employs her language and poems in order to defend human ...
Nehal Mohsen Helmy
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Polynomial-Exponential Bounds for Some Trigonometric and Hyperbolic Functions

Axioms, 2021
Recent advances in mathematical inequalities suggest that bounds of polynomial-exponential-type are appropriate for evaluating key trigonometric functions.
Yogesh J. Bagul +3 more
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New Refinements and Improvements of Some Trigonometric Inequalities Based on Padé Approximant

Journal of Mathematics, 2020
A multiple-point Padé approximant method is presented for approximating and bounding some trigonometric functions in this paper. We give new refinements and improvements of some trigonometric inequalities including Jordan’s inequality, Kober’s inequality,
Lina Zhang, Xuesi Ma
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New Polynomial Bounds for Jordan’s and Kober’s Inequalities Based on the Interpolation and Approximation Method

Mathematics, 2019
In this paper, new refinements and improvements of Jordan’s and Kober’s inequalities are presented. We give new polynomial bounds for the s i n c ( x ) and cos ( x ) functions based on the interpolation and approximation ...
Lina Zhang, Xuesi Ma
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Some Inequalities for Generalized Hyperbolic Functions

Moroccan Journal of Pure and Applied Analysis, 2020
In this paper, we establish several inequalities involving certain generalizations of the hyperbolic functions. The established results serve as generalizations of some known results in the literature.
Nantomah Kwara, Prempeh Edward
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On the Strengthened Jordan's Inequality

Journal of Inequalities and Applications, 2008
The main purpose of this paper is to present two methods of sharpening Jordan's inequality. The first method shows that one can obtain new strengthened Jordan's inequalities from old ones.
Yan-Ling Li, Jian-Lin Li
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International Journal of Mathematics and Mathematical Sciences, 2006
The main purpose of this note is to establish an identity which states that the function sinx/x is a power series of (π2−4x2) with positive coefficients for all x≠0. This enable us to obtain a much stronger Jordan's inequality than that obtained before.
Jian-Lin Li
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mathematics