Bayu, C. P., Yohanie, D. D., & Handayani, A. D. (2021). Analysis of student errors in solving comparative trigonometry problems of right-angled triangles based on watson’s criteria. Jurnal Math Educator Nusantara: Wahana Publikasi Karya Tulis Ilmiah Di Bidang Pendidikan Matematika, 7(2), 161-171. https://doi.org/10.29407/jmen.v7i2.16247