Answer all the questions. This is Math for EE and CE.

5 Let ABEMu (R). Show that AB singular ( A singular VB singular) 6) Rotation matrix. Consider the rotation matrix R(9 ) = cos) - sins Show that det Rig) = 1. 7 ) Complex number matrix Let z= atbiEC be a complex number with a bElk, and define M(z) = a-6 Le a Show that.. det M( 2 ) = 121, VZEC