According to the documentation LookVector is equivalent to Vector3.new(r00, r01, r02), RightVector is equivalent to Vector3.new(r10, r11, r12), and UpVector is equivalent to Vector3.new(r20, r21, r22). This is incorrect, consider the following:
local cf = CFrame.new(1,2,3,4,5,6,7,8,9,10,11,12)
print("RightVector:",cf.RightVector)
--> RightVector: 4, 7, 10
print("UpVector:",cf.UpVector)
--> UpVector: 5, 8, 11
print("LookVector:",cf.LookVector)
--> LookVector: -6, -9, -12
local x,y,z,r00,r01,r02,r10,r11,r12,r20,r21,r22 = cf:GetComponents()
print("x:",x)
--> x: 1
print("y:",y)
--> y: 2
print("z:",z)
--> z: 3
print("r00:",r00)
--> r00: 4
print("r01:",r01)
--> r01: 5
print("r02:",r02)
--> r02: 6
print("r10:",r10)
--> r10: 7
print("r11:",r11)
--> r11: 8
print("r12:",r12)
--> r12: 9
print("r20:",r20)
--> r20: 10
print("r21:",r21)
--> r21: 11
print("r22:",r22)
--> r22: 12
RightVector is equivalent to Vector3.new(r00, r10, r20), UpVector is equivalent to Vector3.new(r01, r11, r21), and LookVector is equivalent to Vector3.new(-r02, -r12, -r22).