Analisis Kesalahan dalam Menyelesaikan Soal Trigonometri pada Siswa Kelas X SMA Ekasakti Padang

This research is motivated by the number of students who make errors in solving trigonometry problems. This can be seen from the low average value of daily trigonometry tests for class X students of SMA Ekasakti Padang in the 2021/2022 school year. Teachers were necessary to know in advance what caused the student's mistakes. This study aims to (1) determine the causes of errors in class X SMA Ekasakti Padang in solving trigonometry problems, and (2) determine the percentage of errors made by class X students at SMA Ekasakti Padang in solving trigonometry questions. This type of research is descriptive. The research subjects in this study were students of class X SMA Ekasakti Padang. Data analysis in this study was divided into two, namely (1) written test results data were analyzed by calculating the percentage of students who made mistakes in solving trigonometric questions, and (2) interview data analysis was carried out by reducing data, presenting data, and concluding. The mistakes made by students in solving trigonometry problems are conceptual errors and algorithm errors. Conceptual errors were made by 83.33% of students, where the most incorrect concept was the triangle concept. Furthermore, the principle error is 66.67%, and the algorithm error is 50%. The causes of errors made by students in solving trigonometry problems are carelessness and haste, poor understanding of students on questions, lack of understanding of prerequisite concepts related to questions, and interpretation of the meaning of the questions incorrectly or incorrectly in reading the questions.