You are Here: Home >< Maths

# parametric curves - points of self intersection Watch

1. I have a curve
r(t)=((2+cos(1.5t))cos(t))i + ((2+cos(1.5t)sin(t))j where t belongs to [0,4*pi] and I have drawn it out.
The question asks to find the points of self intersection, but I am unsure how to do this.
2. (Original post by ellemay96)
I have a curve
r(t)=((2+cos(1.5t))cos(t))i + ((2+cos(1.5t)sin(t))j where t belongs to [0,4*pi] and I have drawn it out.
The question asks to find the points of self intersection, but I am unsure how to do this.
same x same y

look for the period of cos(3/2t)cost for a start...

any good?
3. (Original post by TeeEm)
same x same y

look for the period of cos(3/2t)cost for a start...

any good?
okay, so i've found that the period of cos(3/2t)cos(t) is 4pi. I still don't understand what to do next
4. (Original post by ellemay96)
okay, so i've found that the period of cos(3/2t)cos(t) is 4pi. I still don't understand what to do next
this all standard stuff for laplace

what is exactly the problem?
5. i
(Original post by TeeEm)
this all standard stuff for laplace

what is exactly the problem?

(Original post by ellemay96)
okay, so i've found that the period of cos(3/2t)cos(t) is 4pi. I still don't understand what to do next
ignore my last comment as this was a reply to a different thread

the procedure is standard but very long to explain.

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 14, 2015
Today on TSR

Can you relate?

### 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