Ask Singapore Homework?

Upload a photo of a Singapore homework and someone will email you the solution for free.



Ask ManyTutors

Question

secondary 3 | A Maths
One Answer Below

Anyone can contribute an answer, even non-tutors.

Answer This Question
Jason Lim
Jason Lim

secondary 3 chevron_right A Maths chevron_right Singapore

Pls help with iv) ONLY thanks in advance

Date Posted: 3 years ago
Views: 342
add a comment

See 1 Answer

Ask ManyTutors
done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Ting Xuan
Ting Xuan's answer
154 answers (Tutor Details)
1st
Eric Nicholas K
Eric Nicholas K
3 years ago
No; you missed out the rejection of the negative solution, since angle A being obtuse implies angle A/2 being acute, meaning to say that sin (A/2) must have a positive value.