4: Matrices Last updated Save as PDF Page ID 125042 4.1: Matrices 4.2: Addition, Subtraction, Scalar Multiplication, and Products of Row and Column Matrices 4.3: Matrix Multiplication 4.4: Rotation Matrices in 2-Dimensions 4.5: Finding the Angle of Rotation Between Two Rotated Vectors in 2-Dimensions 4.6: Rotation Matrices in 3-Dimensions