Final answer:
The columns of the 3x3 identity matrix are (1,0,0), (0,1,0), and (0,0,1).
Step-by-step explanation:
The 3x3 identity matrix is a special matrix in which the diagonal elements are all 1's and the rest of the elements are 0's. The columns of the identity matrix can be determined by looking at each column separately.
For example, column 1 of the identity matrix is (1,0,0), column 2 is (0,1,0), and column 3 is (0,0,1). Each column represents a unit vector in a different direction.