ELSA KOMALA; DIDI SURYADI; DADAN DASARI. Learning Obstacle Related to the Ability of High School Student Representation to the Trigonometry Concept. International Proceedings Conferences Series, [S. l.], p. 43-49, 2020. DOI: 10.22236/ie.v1i1.107. Disponível em: https://proceedings.uhamka.ac.id/index.php/ie/article/view/107. Acesso em: 29 apr. 2026.