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.

Answer This Question
Dunelm
Dunelm

secondary 3 chevron_right A Maths chevron_right Singapore

Need help with (a). Thank You

Date Posted: 9 months ago
Views: 92
J
J
9 months ago
You should continue from your working :

3√3 / 2 cos x - 11/2 sin x = 0

3√3 / 2 cos x = 11/2 sin x

sin x / cos x = 3√3 / 2 ÷ 11/2

tan x = 3√3 / 11

basic angle = tan-¹ 3√3 / 11 ≈ 25.28° (2 d.p)

Since tan x is positive, we look at the 1st and 3rd quadrant.

x ≈ 25.28°, 180° + 25.28°

x ≈ 25.28°, 205.28°

x = 25.3° , 205.3° (1 d.p)

See 1 Answer

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
jeaff
Jeaff's answer
2 answers (A Helpful Person)
1st
yes