A concise proof of Oppenheim's double inequality relating to the cosine and sine functions
Feng Qi, Bai-Ni Guo
TL;DR
This paper offers a concise proof of Oppenheim's double inequality involving cosine and sine functions and includes a survey of related topics, clarifying the inequality's significance and applications.
Contribution
The paper presents a simplified proof of Oppenheim's double inequality and surveys related research, enhancing understanding of the inequality's context and implications.
Findings
Concise proof of Oppenheim's double inequality provided
Survey of related topics and prior research included
Clarifies the inequality's applications and significance
Abstract
In this paper, we provide a concise proof of Oppenheim's double inequality relating to the cosine and sine functions. In passing, we survey this topic.
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