| Axiomatizing Trigonometry |
| Received:December 29, 1991 |
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| Abstract: |
| In this paper, two axioms for cosine function are given and the well-known definitions defined by power series as well as by the arc length on a unit circle have been obtained. Obviously the latter implies both axioms. Thus the two axioms given do constitute a characterization for the cosine function. |
| Citation: |
| DOI:10.3770/j.issn:1000-341X.1993.02.016 |
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