RAZÕES TRIGONOMÉTRICAS NO TRIÂNGULO RETÂNGULO: UMA ANÁLISE DE ERROS NO ENSINO MÉDIO

• Autor(a) principal: Fortes, Adriana Wachtmann Borges
• Data de Publicação: 2012
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional Universidade Franciscana
• Texto Completo: http://tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/131; http://www.tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/396
• topic: Análise de erros; Trigonometria; Webquest; Error analysis; Trigonometry; Webquest; CNPQ::CIENCIAS EXATAS E DA TERRA::MATEMATICA

This research aimed to analyze errors made by high school students to solve problems involving trigonometric reasons in the rectangle triangle and plan activities to remediate them. We also seek to collect the opinions of teachers about such errors, through a questionnaire applied to them. The investigation was carried out with students from second year of high school in the city of Quevedos, RS. The errors made by the students in response to a test were categorized separately for each question. We analyzed 11 public school teachers and 58 high school students. Thirty-three students answered these questions and, further, 25 other students made some activities on Trigonometry, in order to verify if these students also had difficulties in solving such issues. In the final stage of this research participated 12 students of the Youth and Adults Education (EJA) who tested the activities that had been proposed as final product of this dissertation. By the number of occurrences in each class of errors, it was noted that the students have many difficulties related to the identification of the names of the sides of a triangle and to the knowledge of trigonometric relationships defined therein. Teachers who responded to the survey have generally considered that the difficulties of the students are related to the lack of attention and knowledge prerequisites. All the teachers work in public schools in Quevedos as well in the neighboring city, Santa Maria, RS. Based on the opinions and suggestions made by the teachers, we created a Webquest as final product of this research, with a sequence of activities that aim to overcome the difficulties presented by the students.