Muhijah, I., Sari, R. M. M., Zulkarnaen, R. and Effendi, K. N. S. (2025) “The Relationship between Self-Directed Learning and Problem-Solving Ability in Trigonometry”, Journal of Mathematics Instruction, Social Research and Opinion. Bandung, Indonesia, 4(4), pp. 1351–1362. doi: 10.58421/misro.v4i4.824.