The Didactic Triad in Trigonometry

The purpose of this book is to share the results obtained in the research carried out at the Faculty of Exact and Natural Sciences of the National University of Mar del Plata, regarding the knowledge and difficulties on basic aspects of Trigonometry of students taking Algebra in the first year of Bachelor's Degrees in Chemistry, Biochemistry, Physics and Mathematics, as well as on the approach to the subject of Trigonometry made by teachers of the sixth year of secondary schools in their classes during the pandemic. Likewise, a didactic sequence related to the subject is presented for the sixth year of Secondary School.On the other hand, an experience is reported on a first year class of the Faculty, using GeoGebra, whose objective is to reaffirm concepts related to the properties of the modules and arguments of Complex Numbers (a subject in which Trigonometry concepts are applied).