Compilation of all things math --- questions obtained via students' consultation, related math sites. * Do also check out my EduTech contributions at go.gov.sg/changcl
My solution
easier method:
https://www.instagram.com/p/DIaLtKZz_Eo/?img_index=2
by trigo ;p :
https://www.instagram.com/p/DIaLtKZz_Eo/?img_index=3