Ask Singapore Homework?

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



Question

secondary 3 | E Maths
One Answer Below

Anyone can contribute an answer, even non-tutors.

Answer This Question
Skr
Skr

secondary 3 chevron_right E Maths chevron_right Singapore

helppppp!

Date Posted: 5 years ago
Views: 435

See 1 Answer

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
1st
Careful when you use the cosine rule for part 2.

The alternative method is to find angle ADC first by the sine rule before finding angle ACD by recalling that the sum of angles in a triangle is 180 degrees.
J
J
5 years ago
If sine rule is used, one obtains a value of AD = 5.4054 cm instead. Odd.
Eric Nicholas K
Eric Nicholas K
5 years ago
Hmmm...possibly an overload of data. In other words, the 15 degrees data is misleading.
J
J
5 years ago
Yup. If the sides 2cm and 5cm are assumed to be correct, then the angle 15° is off