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Curated Video
Matrix Multiplication (same dimension)
Find all six trig ratios given a point on the terminal side of theta. In this video we work this common type of problem. We use the Pythagorean Theorem to find "r" (hypotenuse), and then use the given "x" (adjacent) and "y" (opposite) to...
Khan Academy
Khan Academy: Algebra: Matrices: Matrix Multiplication (Part 2)
This lesson goes through three examples of matrix multiplication. Explains how the dimensions of matrices affect whether or not the matrices can be multiplied, how to determine if they can be multiplied, and what size the resulting...
Khan Academy
Khan Academy: Algebra: Matrices: Matrix Multiplication (Part 1)
A lesson on multiplying matrices. Gives an example of two 2 X 2 matrices being multiplied. Illustrates that matrix multiplication is not commutative and that the order in which matrices are multiplied is important. [13:41]