Khan Academy: Linear Algebra: Transpose of a Vector

Video demonstrating that the dot product of two vectors is equivalent to the matrix product of the transpose of the first vector times the second vector. Uses this idea to show that the dot product of a matrix-vector product and another vector is equivalent to the dot product of the first vector and the matrix-vector product of the tranpose matrix and the second vector. Includes associativity of matrix products. [12:06]