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Extensions of the natural approach to refinements and generalizations of some trigonometric inequalities. (English) Zbl 1445.26015

Summary: In this paper we propose a new method for sharpening and refinements of some trigonometric inequalities. We apply these ideas to some inequalities of Wilker-Cusa-Huygens type.

MSC:

26D05 Inequalities for trigonometric functions and polynomials
33B10 Exponential and trigonometric functions
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References:

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