Eric Nicholas K's answer to Germaine'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)
My version
Eric Nicholas K
Eric Nicholas K
4 years ago
Alternatively, you can convert the angles using the double angle formula as well to solve the equations, but this approach is much more difficult.