Year 12s: what will be the first way you research your future options? >>

Bearing question

I don't know how to work out the missing bearing of boat r from q (basically where I've put x)

The way you've labelled the diagram isn't right. If we call the North pointer just under the "Figure 2" legend point F, then if the bearing of boat Q from boat P is 327, that means that the reflex angle FPQ (clockwise) is 327. The acute angle FPQ is then 360 - 327 = 33. If the bearing of boat R from boat P is 41, that means that the acute angle FPR is 41.

From there, you're probably looking at the cosine and sine rules to proceed further.

Reply 2

ghostwalker

Original post by 1233333344s222

I don't know how to work out the missing bearing of boat r from q (basically where I've put x)

Your diagram is incorrect. I've marked the correct known angles in red - attached. Make sure you understand why they are what they are. Your answer to part a) is corrrespondingly in error.

Can you complete it from there?

Reply 3

Ramory

Original post by 1233333344s222

I don't know how to work out the missing bearing of boat r from q (basically where I've put x)

Where do you get these papers?

Reply 4

username3973192

Original post by Ramory

Where do you get these papers?

Are you looking for past papers?

Reply 5

Ramory

Original post by thestudent33

Are you looking for past papers?

No... I am looking for the questions posted in this post.. From where are they?

Reply 6

Mubeen548

a) I don't think p is 33, it's 33 41=74 because the question says r is 15km from boat p on a bearing of 041. then use cosine rules= 15^2 7^2-2(15)(7)(cos(74)). then square root that to get 14.7.