4: Matrices Last updated May 8, 2023 Save as PDF 3.7: The Cross Product- Geometry 4.1: Matrices Page ID125042 ( \newcommand{\kernel}{\mathrm{null}\,}\) 4.1: Matrices4.2: Addition, Subtraction, Scalar Multiplication, and Products of Row and Column Matrices4.3: Matrix Multiplication4.4: Rotation Matrices in 2-Dimensions4.5: Finding the Angle of Rotation Between Two Rotated Vectors in 2-Dimensions4.6: Rotation Matrices in 3-Dimensions