Haryani, D., Subagjo, A., Hamdani, M., Ali Hasan, Q. ., & Widyanti, N. (2022). ANALYSIS OF THE DIFFICULTIES OF CLASS X STUDENTS OF SMKN 4 PALANGKA RAYA IN SOLVING TRIGONOMETRY PROBLEMS. Jurnal Pendidikan, 23(1), 29–38. https://doi.org/10.52850/jpn.v23i1.4667