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Peer reviewedBonsangue, Martin V. – Mathematics Teacher, 1993
Geometric interpretations and derivations of the six trigonometric relationships are demonstrated. Selected for discussion are limiting values, geometric verification of trigonometric identities, a one-dimensional illustration of the Pythagorean relationships, and the geometric derivation of infinite-series relationships. (DE)
Descriptors: Geometry, Mathematical Concepts, Mathematical Models, Mathematics Education
