摘要：The purpose of this study was to describe the activities,procedures,and strategies as well as the change of Hypothetical Learning trajectory (HLT) to Learning trajectory (LT) in formulating the rules of sines and cosines through PMRI (Pembelajaran Matematika Realistik Indonesia/Indonesian Realistic Mathematics Education) learning. The subjects were 38 students of class X1 SMAN 6 Prabumulih. The research design consist of three stages:preliminary design,design of experiments (pilot experiment and teaching experiment),and retrospective analysis. Data were collected through observation of learning activities,interviews,videos,and photos. The results showed that students use a triangle as the starting point in formulating rules of sines and cosines through PMRI learning. Change of Hypothetical Learning trajectory (HLT) to Learning trajectory (LT) occurs through the activity of students in exploring the triangles in PMRI learning.
其他摘要：Tujuan penelitian ini adalah untuk mendeskripsikan aktivitas,prosedur,dan strategi serta perubahan dari Hypothetical Learning Trajectory (HLT) ke Learning Trajectory (LT) dalam merumuskan aturan sinus dan cosinus melalui pembelajaran dengan pendekatan PMR
其他关键词：aturan sinus dan aturan cosinus;segitiga;design research;PMRI
