Hello there.
Here I am again!
I've really been searching on this subject, but I can't seem to find out how.
In this arganddiagram (I've found it on the internet)
Image may be NSFW.
Clik here to view.
A line is drawn from the origin, to the coordinate, and the angle has been drawn too.
How do you do this (either in MC15 or prime) - It would really be great, as I have an exam on the subject monday :-)!
Thank you,
Ben
