CONCEPCIONES Y MATEMÁTICA ESCOLAR: UNIDADES DE MEDIDA DE LAS FUNCIONES TRIGONOMÉTRICAS EN EL NIVEL MEDIO SUPERIOR.

This article presents a didactic-cognitive analysis of the unit of measurement that contains the argument of the trigonometrical functions at Mexican high school level. The didactic study demonstrates the phenomenon of dethematization in the radian, understood as the articulator concept, while the cognitive study offers elements for understanding the perceptions of teachers and students in relation to the angular units of trigonometric functions in school mathematics. In turn, the analysis of questionnaires applied to students and teachers indicate: 1) the improper use of calculators or other calculation systems and the tendency of teachers to focus on significant values; 2) that students do not perceive that the use of the calculator for trigonometric functions is mediated by at least two methods of calculation: the sexagesimal and the radian. [ABSTRACT FROM AUTHOR]