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http://hdl.handle.net/10553/69787
| Title: | Proof without words: tangent plus cotangent is greater or equal than 2 | Authors: | Plaza, Ángel | UNESCO Clasification: | 1202 Análisis y análisis funcional | Issue Date: | 2018 | Journal: | Mathematics Magazine | Abstract: | Using the representation of tan α and cot α in the unit circle, it is shown without words that tan α + cot α ≥ 2. | URI: | http://hdl.handle.net/10553/69787 | ISSN: | 0025-570X | DOI: | 10.1080/0025570X.2018.1465772 | Source: | Mathematics Magazine [ISSN 0025-570X], v. 91 (5), p. 363 |
| Appears in Collections: | Artículos |
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