Alfitri, Putri Armania, Nurdiyah Kurniati, Sufyani Prabawanto, and Kartika Yulianti. “An An Exploration of High School Students’ Errors in Solving Trigonometry Problems”. Jurnal Cendekia : Jurnal Pendidikan Matematika 8, no. 1 (March 31, 2024): 714-724. Accessed April 27, 2025. https://j-cup.org/index.php/cendekia/article/view/2109.