Reza, Hazim Saputra Filia, Amelia Defrianti Putri, and Dhanachat Anuniwat. 2026. “Realistic Mathematics Education Improves Trigonometric Ratios: A Classroom Action Research Study”. SJME (Supremum Journal of Mathematics Education) 10 (1):55-67. https://doi.org/10.35706/sjme.v10i1.13148.