You are Here: Home >< Maths

# Year 13 Maths Help Thread

1. (Original post by physicsmaths)
What is it to u, so racist

Posted from TSR Mobile
Aliens, I tell you.
2. (Original post by Tau)
I agree it's unnecessary, it was to highlight that it was an example of the general case of .
Yeah, or does the best job to highlight that, not .
3. (Original post by Zacken)
Yeah, or does the best job to highlight that, not .
Sorry Zacken I would have actually used if I was doing it.
4. (Original post by Tau)
Sorry Zacken I would have actually used if I was doing it.
DNt say sorry to him hes just being salty cause he cant deal with - signs
5. http://www.ukmt-resources.org.uk/SMC12.html

Q17 on the link. The question references 'four quarter circles' but I can't spot any in the diagram! Am I missing something?
6. (Original post by Palette)
http://www.ukmt-resources.org.uk/SMC12.html

Q17 on the link. The question references 'four quarter circles' but I can't spot any in the diagram! Am I missing something?
Says they are of radius 1, so I assume if you split the diagram into 4 equal parts, you will have your 4 quarter-circles. One such way is to draw 2 diagonals across the circle and you will have split it into 4 quarter circles of radius 1.

7. I get that time to get to the meeting point will be the same for both cars but I honestly can't get any further than that. Please help
8. How do I sketch the graph between 0 and pi? I know I could get the points where the graph crosses the x axis, but how would I know that the amplitude of the graph increases as x increases?
9. (Original post by NotNotBatman)
How do I sketch the graph between 0 and pi? I know I could get the points where the graph crosses the x axis, but how would I know that the amplitude of the graph increases as x increases?

Factor out the and since then so the amplitude is increasing.
10. (Original post by solC)
Factor out the and since then so the amplitude is increasing.
I don't understand on the second line how LHS>RHS means the amplitude is increasing.
11. (Original post by NotNotBatman)
I don't understand on the second line how LHS>RHS means the amplitude is increasing.
Well if then so as x gets larger, the peak also gets larger whenever since is always increasing
12. (Original post by solC)
Well if then so as x gets larger, the peak also gets larger whenever since is always increasing
Okay, thanks.
13. Can someone explain this fp2 question 15 ex 3h
14. Can someone also explain why for part b when x=4 the equation =2Attachment 587012587014
Attached Images

15. (Original post by youreanutter)
Can someone explain this fp2 question 15 ex 3h
For this one I think it's easiest if you let , as it makes it easier to see what k is.
16. (Original post by youreanutter)
Can someone explain this fp2 question 15 ex 3h
Let z=2e^ix
Falls right out

Posted from TSR Mobile
17. (Original post by solC)
For this one I think it's easiest if you let , as it makes it easier to see what k is.
Howcomes u are allowed to jist let z be what u want and how did u no to do that and what wud i do next still confused sorry
18. (Original post by medhelp)

I get that time to get to the meeting point will be the same for both cars but I honestly can't get any further than that. Please help
Please post the image the right way round I know iT looks right when you upload it though
19. (Original post by youreanutter)
Howcomes u are allowed to jist let z be what u want and how did u no to do that and what wud i do next still confused sorry
Well since we know the points are on the circle the general point on that circle is . Using the exponential form works too as Physicsmaths said

Let

And the range of this is so K is 4
20. (Original post by youreanutter)
Can someone explain this fp2 question 15 ex 3h
It can be done with a little rearranging, using

Write a reply… Reply
Submit reply

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
that username has been taken, please choose another Forgotten your password?
2. this can't be left blank
this email is already registered. Forgotten your password?
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
your full birthday is required
1. Oops, you need to agree to our Ts&Cs to register
2. Slide to join now Processing…

Updated: April 28, 2017
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:
Today on TSR

### A-level exams coming up?

Find everything you need here.

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
Study resources

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

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