Wan, Mingjie, Gang Xiao, and Siqiang Yang. 2025. “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 (10):141-49. https://doi.org/10.53469/jerp.2025.07(10).27.