Khofifah K, Rosyadi R, Gunadi F, Nandang N, Runisah R. Students’ Difficulties In Solve Trigonometry Problem Solving According To Step Polya’s. Mathline [Internet]. 2024 Aug. 26 [cited 2024 Oct. 14];9(3):919-46. Available from: https://mathline.unwir.ac.id/index.php/Mathline/article/view/571