Eric Nicholas K's answer to idununderstandasinglething's Secondary 4 A Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
1st
We always strive to reduce the equations to a familiar form sin x = k, cos x = k or Tan x = k before calling quadrants, basic angle alpha and the actual main angle x.