You are Here: Home >< Maths

# Geometry and Trigonometry Help!!! (C2) Watch

1. Three points A, B and C lie on a level plane.B is 7 km from A on a bearing of 030°.C is 5 km from B on a bearing of 280°.The distance AC is Answer km.The bearing of A from C is Answer°.The area of the triangle ABC is Answer km°.(Give all answers correct to 3 significant figures)

How do I do this question. I've tried so many times!!!
2. (Original post by Bohki9998)
Three points A, B and C lie on a level plane.B is 7 km from A on a bearing of 030°.C is 5 km from B on a bearing of 280°.The distance AC is Answer km.The bearing of A from C is Answer°.The area of the triangle ABC is Answer km°.(Give all answers correct to 3 significant figures)

How do I do this question. I've tried so many times!!!
What have you tried so far? I assume you've drawn a diagram - can you post a picture of it?
3. (Original post by notnek)
What have you tried so far? I assume you've drawn a diagram - can you post a picture of it?

I cant post the picture of it, but i have drawn the diagram.
The calculation for the length of AC that I had was:
5sin(80)
----------
sin(30)
4. (Original post by Bohki9998)
I cant post the picture of it, but i have drawn the diagram.
The calculation for the length of AC that I had was:
5sin(80)
----------
sin(30)
I think your diagram is incorrect which is why it would be useful if you posted it.

You seem to be assuming that angle CAB is 30. Have another think about that.
5. (Original post by Bohki9998)
I cant post the picture of it, but i have drawn the diagram.
The calculation for the length of AC that I had was:
5sin(80)
----------
sin(30)
Ignore the sentence in my last post (now deleted) about using AB in your working.

The rest of my post still applies.

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: March 3, 2016
Today on TSR

### Best unis for graduate salaries

Half of the top 10 aren't even RG...

### My alarm went off in an exam!

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• 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

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE