Students’ Errors in Solving Word Problems Involving Angles of Elevation and Depression and Performance Level in Grade 9 Trigonometry: Basis for Development of a Teacher-Made Material. International Journal of Latest Technology in Engineering Management & Applied Science, [S. l.], v. 14, n. 3, p. 216–235, 2025. DOI: 10.51583/IJLTEMAS.2025.140300026. Disponível em: https://www.ijltemas.in/submission/online/article/view/1597.. Acesso em: 11 jun. 2026.