You are Here: Home >< Maths

# A trigonometry problem :S Watch

1. a ladder 2.5m long leans against a vertical wall so that it makes an angle of 68(degrees) with the horizontal grounf. how far up the wall does the aldder reach ? give your answer to one decimal place.

^^ i have worked it out however im not fully convinced that my answer is correct as it looks odd. my answer was 0.9m by using cos
thankyou for any help.
2. It might be easier just to post your entire homework in one thread
3. BTW your answer is wrong since the wall is OPPOSITE your angle
4. (Original post by silverose)
a ladder 2.5m long leans against a vertical wall so that it makes an angle of 68(degrees) with the horizontal grounf. how far up the wall does the aldder reach ? give your answer to one decimal place.

^^ i have worked it out however im not fully convinced that my answer is correct as it looks odd. my answer was 0.9m by using cos
thankyou for any help.
You have found the distance from the wall to the foot of the ladder.

You need sin and not cos.
5. sin x = opposite/hypotenuse
sin68= length/2.5

length=2.5sin68= 2.3m (2sf)
6. (Original post by silverose)
a ladder 2.5m long leans against a vertical wall so that it makes an angle of 68(degrees) with the horizontal grounf. how far up the wall does the aldder reach ? give your answer to one decimal place.

^^ i have worked it out however im not fully convinced that my answer is correct as it looks odd. my answer was 0.9m by using cos
thankyou for any help.
See the diagram below:

7. .....
8. #.\
#...\
#.....\
#.......\ 2.5m.......sin68= x/2.5
#.........\ ............x= 2.5Xsin68
#...........\...........x=2.3 m (1.dp)
#_____(68 \
9. (Original post by MarshmallowBob)
#.\
#...\
#.....\
#.......\ 2.5m.......sin68= x/2.5
#.........\ ............x= 2.5Xsin68
#...........\...........x=2.3 m (1.dp)
#_____(68 \
I think i posted a better diagram above .
10. (Original post by raheem94)
See the diagram below:

This picture made my day.
11. (Original post by raheem94)
I think i posted a better diagram above .
Lol i couldnt agree more :P i had wasted a good 5 mins with the diagram, then is saw your post, so i thought might aswell post it.
12. (Original post by myfriendSQRT(-1))
This picture made my day.
Lol
13. (Original post by raheem94)
Lol
I particularly enjoyed that you clarified where the wall was.
14. (Original post by Hype en Ecosse)
I particularly enjoyed that you clarified where the wall was.
How do you enjoy a maths diagram?
15. (Original post by raheem94)
How do you enjoy a maths diagram?
The same way you enjoy anything? The notion that you had to clarify that the only vertical structure in the diagram was a wall made me smile.
16. (Original post by Hype en Ecosse)
The same way you enjoy anything? The notion that you had to clarify that the only vertical structure in the diagram was a wall made me smile.
I just wanted to label the diagram. However, i didn't labelled the horizontal ground .
17. (Original post by TenOfThem)
It might be easier just to post your entire homework in one thread
nobody's forcing you to help me .. don't like the fact that i can't do all my homework by myself but i'm trying to get help then keep scrolling and keep any nasty comments to yourself love.
18. Thankyou so much for the patience with the diagrams guys .. really helped
19. (Original post by silverose)
nobody's forcing you to help me .. don't like the fact that i can't do all my homework by myself but i'm trying to get help then keep scrolling and keep any nasty comments to yourself love.
Its not a 'nasty comment'. Why can't you post all the questions in one thread?

We don't have problem with you not able to do your homework, but you were suggested to post all the questions in one thread rather than making multiple threads.
20. (Original post by silverose)
nobody's forcing you to help me .. don't like the fact that i can't do all my homework by myself but i'm trying to get help then keep scrolling and keep any nasty comments to yourself love.
Accidentally neg repped you when I wanted to pos rep you! Sorry

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: April 6, 2012
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

## 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

Can you help? Study help unanswered threads

## 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