Ask Singapore Homework?

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



Question

secondary 4 | E Maths
One Answer Below

Anyone can contribute an answer, even non-tutors.

Answer This Question
Kathy
Kathy

secondary 4 chevron_right E Maths chevron_right Singapore

Thank you

Date Posted: 4 years ago
Views: 234
J
J
4 years ago
sin θ = sin (180° - θ)

If sin θ = 0.723,

Basic angle θ = sin-¹(0.723)

≈ 46.303°

Since the angle in the triangle is obtuse,

Angle
= 180° - 46.303°
= 133.697°
= 133.7° (1 d.p)
Eric Nicholas K
Eric Nicholas K
4 years ago
Kathy, you can continue to use the ASTC approach as always, just that angles in a triangle are limited to within 180 degrees (the first two quadrants equivalent).

See 1 Answer

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
syjiaxuan
Syjiaxuan's answer
290 answers (A Helpful Person)
1st
Hope this helps