polar point in rectangular coordinate help

[lakitu]

Hi I hope this is in the correct forum

My teacher has told me I will need to be able to do these in my up and comping exam later this month. He covered the topic a while ago but I didn't quite understand. Here is an example I have.

Express the polar point (6, 120 °) in rectangular coordinates.

I have no idea how to start doing these? Guidence of any kind would be wonderful.

Regards Lakitu

[VBAhack]

Try this:

http://home.scarlet.be/~ping1339/pol...olar-to-cartes

[zaza]

Hi,

Check out the Coordinates and vectors link in my sig. Although the link deals with 3D coordinates, 2D are just the same but without the Z dimension. In a nutshell, coordinates X and Y are related to coordinates R and theta by:

X = R cos theta
Y = R sin theta

zaza