Then we completed our notes on finding the volume of a solid formed by rotation around a horizontal or a vertical line. Today we looked at the region having some gap between it and the axis of rotation. The cross section ends up being a washer, so we need to determine the outer and inner radii.
Use the video links below for more examples of the washer method.
http://www.khanacademy.org/math/integral-calculus/solid_revolution_topic/solid_of_revolution/v/solid-of-revolution--part-4
http://www.youtube.com/watch?v=E5OOMbz5jZk
http://www.youtube.com/watch?v=ithgZfRKMHI
http://www.youtube.com/watch?v=lE814ngFt3I
HW: Quiz 7.1 (area between curves) is tomorrow.
Complete the front side (1 -4) of the 7.2 packet from today.
AP Exam review tomorrow and Thursday after school in C215.