Finding the area (1 Viewer)

[zeebobDD]

Can someone help me with this question, not sure where to start

 

[seanieg89]

Integrate in polar coordinates to find the area of the two regions and subtract the inner one from the outer one.

Remember that the "infinitesimal area element" in polar coordinates is: as opposed to the more familiar in rectangular coordinates.

 

[zeebobDD]

Alrite so i have that, but what are the limits for the first integral? it doesn't really tell us what is it, i'm assuming it goes from 0 to 2pi?

 

[seanieg89]

Yeah 0 to 2pi. As long as you hit each point in your domain once (apart from the overlap at 0 and 2pi which has area 0) you are all g.

Sent from my GT-I9000 using Tapatalk 2

 

[zeebobDD]

sweet thanks bro

 

[zeebobDD]

Could u have a check to see if parts b n c are correct,