1. Disk Method 　a. x = sqrt(9 - y^2), y = 1, y = 3, x = 1 (about X-axis)

2. Circular Rings/Washer Method 　a. y = 2*sqrt(x) (about Y-axis), y = 4 (about X-axis)

2. Cylindrical Method 　a. y = 1 + x^3, x = 1, y = 9 (about X-axis)

2. Cylindrical Method 　b. y = x^2, y = 4*x - x^2 (about line x = 4)

[ Half angle identities and others ]

[ Solids created by rotation ]

[ Areas bounded ]