Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
secondary 3 | A Maths
One Answer Below
Anyone can contribute an answer, even non-tutors.
Need help with qn (f) and (d). Thank You
Date Posted: 2 years ago
Views: 201
Part (f)
3sin²(x) = 2
sin²(x) = 2/3
sin(x) = ±√2/3
sin(x) = √2/3 or sin(x) = −√2/3
you should be able to carry on from here
3sin²(x) = 2
sin²(x) = 2/3
sin(x) = ±√2/3
sin(x) = √2/3 or sin(x) = −√2/3
you should be able to carry on from here
Part (d)
2sin²(x)cos(x) - cos(x) = 0
cos(x)(2sin²(x) - 1) = 0
cox(x) = 0 or 2sin²(x) - 1 = 0
2sin²(x) = 1
sin²(x) = 1/2
sin(x) = ±√1/2
sin(x) = √1/2 or sin(x) = -√1/2
you should be able to carry on from here! jiayous! and look at the equations from basics. don’t think too complicated. simplify it as much as you can and move on from there! i’m sure you have the trigo formula table as well so use it to its maximum and all the best!
2sin²(x)cos(x) - cos(x) = 0
cos(x)(2sin²(x) - 1) = 0
cox(x) = 0 or 2sin²(x) - 1 = 0
2sin²(x) = 1
sin²(x) = 1/2
sin(x) = ±√1/2
sin(x) = √1/2 or sin(x) = -√1/2
you should be able to carry on from here! jiayous! and look at the equations from basics. don’t think too complicated. simplify it as much as you can and move on from there! i’m sure you have the trigo formula table as well so use it to its maximum and all the best!
See 1 Answer
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
jiayous!
Date Posted:
2 years ago
Thank You
360 Tutoring Program