A simple proof of Oppenheim's double inequality relating to the cosine and sine functions (Q4904287)
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scientific article; zbMATH DE number 6131723
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | A simple proof of Oppenheim's double inequality relating to the cosine and sine functions |
scientific article; zbMATH DE number 6131723 |
Statements
A simple proof of Oppenheim's double inequality relating to the cosine and sine functions (English)
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28 January 2013
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simple proof
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Oppenheim's double inequality
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cosine function
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sine function
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monotonicity
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