I have a tutorial question that is starting to bug me.
I know the formula is:
I have the problem:
Using Green's theorem, find the area of the disc of radius a.
I have notes and a previous example, but unsure where to start, Do I use the fact that:
where r =1
Use the fact that:
Edited: Sorry, I did't see TheEmptySet's post.
ah okay, I was right in assuming that, cheers guys
I got a final answer of 0..
then subbing it in I got:
with the limits 2pi and 0.
I then changed this to by the formula and integrated to get:
and then finally putting the limits in, i got 0, surely it shouldnt be 0..
I didn't notice at first but you have a typo in your formula it should be
Originally Posted by ramdrop
You need to change the sign on the sine term (haha pun intended!) then you will get the answer you wish
So stupid, i copied it from my notes and i must have wrote it down wrong, because i haad both a + and a -, so I took a guess... my bad
I got pi now :)