HW12.3. Diagonalize a symmetric 2x2 matrix Consider a 2 x 2 matrix A = D such that A = QDQT Find an orthogonal matrix 2 x 2-matrix and a diagonal 2 x 2-matrix 0% D 0% Note: In order to be accepted as correct; all entries of the matrices A QDQT and QTQ I must have absolute value smaller than 0.05.