Explore with Wolfram|AlphaMore things to try: eigenvector calculator eigenvector eigenvector {{cos(a),-sin(a),0},{sin(a),cos(a),0},{0,0,1}} ReferencesArfken, G. "Eigenvectors, Eigenvalues." §4.7 in Mathematical Methods for Physicists, 3rd ed. Orlando, FL: Academic Press, pp....