Circles/Arcs?

[vis781]

When i was given a project to complete about two days ago i thought.. yea why not. Little did i know it contains my worst enemy.. Maths!!. So i've been trying to figure this one out and i just can't do all this trig stuff. Could someone please help me out with the following.

I need to be able to work out where the center of the arc point 'p' is in, in X,Y co-ordinates from the center of the circle, in the following diagram. Problem is i need the formula because the size of the circle will change



Thanks.

 

[kulrom]

what exactly do you want to calculate here ... radius of the circle maybe? Area/Surface ...???
It is not very clear. Could you explain more closely please.

 

[Paszt]

I beleive vis781 means to calculate the co-ordinates of the point P given the angle t and the radius of the circle r.
If that's true, use the following formula where Px is the X co-ordinate and Py is the Y co-ordinate:

Px = r * Cos(t)
Py = r * Sin(t)

 

[vis781]

Paszt you are the man!!!

 

[kulrom]

And i am the woman right?

JK glad to know you have wanted solution althrough i must say it wasnt very clear what do you want

 

[vis781]

I apologise kulrom, I didn't mean to sound ungrateful at your offer of help.