You are Here: Home >< Maths

# Bearings question watch

1. Hi,

A man walks 5 km from O on a bearing of 290° to a point A. He then walks a further distance of 2 km on a bearing of 045° to a point B. Find the distance OB and the bearing of O from B.

Please look at my diagram that I attached and tell me if it is right?
I got the distance OB right (4.53km) but I can't get the bearing right. Apparently it is 314° but if you look on my diagram it is impossible to get this!

What am I doing wrong?!
Attached Images

2. (Original post by xsweetcherrypiex)
Hi,

A man walks 5 km from O on a bearing of 290° to a point A. He then walks a further distance of 2 km on a bearing of 045° to a point B. Find the distance OB and the bearing of O from B.

Please look at my diagram that I attached and tell me if it is right?
I got the distance OB right (4.53km) but I can't get the bearing right. Apparently it is 314° but if you look on my diagram it is impossible to get this!

What am I doing wrong?!
You're not doing anything wrong. As you noted, the bearing can't be 314.

Assuming you have the question down correctly, then there's an error somewhere in the book.
3. You have drawn the bearing from B to O, not the bearing from O to B. Think about the angle between the North line above O and B is.
4. (Original post by Ben121)
You have drawn the bearing from B to O, not the bearing from O to B. Think about the angle between the North line above O and B is.
But I thought when it says the bearing of O from B, they mean the clockwise angle from the North line above B to O, since it is from B to O?
5. (Original post by ghostwalker)
You're not doing anything wrong. As you noted, the bearing can't be 314.

Assuming you have the question down correctly, then there's an error somewhere in the book.
Thank you! Mechanics always gets me really worried!
6. how did you get the distance of OB
7. (Original post by BrightStar57)
how did you get the distance of OB
Work out the angles, and then use the cosine rule.
8. thankyou xx, but please could you show me how to work out the angles am reallyyy baad at bearings and seriously need some mega help ....

### Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: November 4, 2011
The home of Results and Clearing

### 2,578

people online now

### 1,567,000

students helped last year
Today on TSR

### University open days

1. SAE Institute
Animation, Audio, Film, Games, Music, Business, Web Further education
Thu, 16 Aug '18
2. Bournemouth University
Fri, 17 Aug '18
3. University of Bolton
Fri, 17 Aug '18
Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams