AC Lim's answer to Alex's Secondary 2 Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
AC Lim
Ac Lim's answer
12536 answers (A Helpful Person)
1st
cos y° = 22/42
y° = cos-¹(22/42) = 58.41°