Kemampuan Pemecahan Masalah pada Materi Trigonometri Dikaji dari Self Concept Siswa Kelas XI IPA

The research aims to describe the problem-solving ability on the materials about trigonometry of students' self concept in SMA Kemala Bhayangkari 1 Kubu Raya eleven grade. The method is used descriptive method with case study of research. The sample of research was 9 students. The sample determination is done by taking 3 students who have high self concept, 3 students who have average self concept, and 3 students who have low self concept. The results of data analysis showed tha the problem-solving ability on the materials about trigonometry for students who have high self concept is very good, problem-solving ability on the materials about trigonometry for students who have average self concept is good, and problem-solving ability on the materials about trigonometry for students who have low self concept is good sufficient