See Yan WONG. Rethinking the Pedagogical Sequence of Trigonometric Formulae in Secondary Education : A Preliminary Assessment of an Alternative Teaching Approach in a Hong Kong Secondary . ijmrr [Internet]. 2026 Sep. 10 [cited 2026 Oct. 23];16(3):204-36. Available from: https://ijmrr.com/index.php/ijmrr/article/view/759