Jurnal
ANALISIS KESALAHAN SISWA DALAM MENYELESAIKAN SOAL TRIGONOMETRI SISWA KELAS XI SEMESTER 1 SMA PGRI 1 PURWAKARTA
The problem discussed in this study is to find and analyze the error factors experienced by students in
solving trigonometric problems. The subjects in this study were selected by purposive sampling. Where
the subjects sellection based on the student’s ability that divided into 3 levels, high ability, medium
ability and low ability. There are 3 subjects in total. The research method used in this study is case study
method, and the research approach is qualitative research. The process of collecting data includes several
methods, namely the documentation method, the method of testing the description as many as 5 problem
descriptions, and the interview method. Then the steps in analyzing the data results are based on
Anderson's mathematical knowledge dimensions which include 4 dimensions of knowledge, namely
factual, procedural, conceptual and metacognition dimensions. The results obtained in the study were
obtained from 5 problems description given based on the difficulty index of each item, students had
difficulty in the type of questions number 3 and number 4, each getting a difficulty index of 0.25 which
proves that all of the questions included hard. Difficulties experienced by students are in the dimensions
of procedural knowledge and metacognition. In problem type number 3 students have difficulty in
solving trigonometric problems in the form of states of graphs in the form of trigonometric functions
students have different difficulties, namely in determining the types of trigonometric functions, reading
graphs of trigonometric functions, and determining the elements contained in the student's chart still
don't understand. In question type number 4 students have difficulty in trigonometric questions in the
form of proof of trigonometric identity. In its completion students experience difficulties in several types
of errors, such as understanding the concept of trigonometric identity, lack of student memory on types
of trigonometric identities, and lack of student accuracy in completing forms of completion.
Keywords: : Trigonometry, Error Analysis, Case Study
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