Erfana Beevee Binte Hassan Shariff's answer to mary's Secondary 4 A Maths Singapore question.
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
From A+B+C=180, A= 180-(B+C). Find sin2A and sin A in terms of B and C. Then work from LHS to RHS. Hope this helps.
Date Posted:
8 months ago
360 Tutoring Program