You are Here: Home >< Maths

# Line integral watch

1. I'm trying to parameterise a unit circle around the origin, travelling anticlockwise. I get a bit confused on how to parameterise the circle with the right direction, can anyone give me some tips on how I can do this correctly? Thanks.
2. I would guess that an anticlockwise circle can be expressed as

.
3. (Original post by gff)
I would guess that an anticlockwise circle can be expressed as

.
Oh sorry, I meant clockwise.
4. Just swap them around? They will represent a circle, and the direction comes from which one is which? I think.

e.g. if

and you assume represents time, then,

at time , you get and and then at the time the values are and .

Therefore, the direction of the curve is clockwise as time increases.
5. Thanks!

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: November 29, 2011
Today on TSR

### Uni league tables

Do they actually matter?

### University open days

• University of Warwick
Sat, 20 Oct '18
• University of Sheffield
Sat, 20 Oct '18
• Edge Hill University
Faculty of Health and Social Care Undergraduate
Sat, 20 Oct '18
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