Wan, Mingjie, Gang Xiao, and Siqiang Yang. “Research on Solving Trigonometric Problems in College Entrance Examination— Take the National 1 2 3 Volumes from 2018 to 2022 As an Example”. Journal of Educational Research and Policies 7, no. 10 (October 30, 2025): 141–149. Accessed January 14, 2026. https://bryanhousepub.com/index.php/jerp/article/view/2653.