BAYU, C. P.; YOHANIE, D. D.; HANDAYANI, A. D. 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, v. 7, n. 2, p. 161-171, 25 Nov. 2021.