Adhikari , Tara Nath, and Abatar Subedi. “Difficulties of Grade X Students in Learning Trigonometry ”. Siddhajyoti Interdisciplinary Journal 2, no. 01 (August 21, 2021): 90–99. Accessed January 25, 2026. https://www.nepjol.info/index.php/sij/article/view/39243.