Turn on thread page Beta
 You are Here: Home >< Maths

Help Please! watch

1. Ive been thinking of how to tackle this question but I'm stuck, can anyone help please?

The diagram shows how an engineer plans to add two supports to shore up the crumbling roof of a victorian sewer tunnel. The two supports are anchored at A(-3,4) and C(3,1) and meet at B(1,5). It is essential that the angle between the two supports at point B is withing 10 degrees or a right angle. Determine whether this particular plan is acceptable.

Thanks
Attached Images

2. Right, so angle 80* < <BAC < 100*

Is that what the question is asking?

Anyway, work out that angle.

I would do it by finding the lengths AB, BC, CA, and drawing a new diagram.
Then you can try and use the trigonometry rules you might know.

Hint:
Spoiler:
Show

I think you should use the cosine rule.

I hope this is right. I've made a fool of myself in this forum too many times.

Reply
Submit reply
Turn on thread page Beta

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: January 24, 2010
Today on TSR

He lied about his age

Thought he was 19... really he's 14

University open days

1. University of Bradford
University-wide Postgraduate
Wed, 25 Jul '18
2. University of Buckingham
Psychology Taster Tutorial Undergraduate
Wed, 25 Jul '18
3. Bournemouth University
Clearing Campus Visit Undergraduate
Wed, 1 Aug '18
Poll
Useful resources

Make your revision easier

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

Create your own Study Planner

Never miss a deadline again

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

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

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.