Assume u and u are both nonzero vectors in IR with included angle 0. Read each choice carefully and only select the TRUE statements. Ou and 1 are perpendicular if and only if u - 7 - 0 Ouxu- Txu Du . v - | |u|| |3| | cos(0) Dux v - | |u| | | |3| | sin(e) | |ux ]| - | | | | | | cos(0) Du . u - 212 Ou and u are perpendicular if and only if u x 7 = 0 Ovixu = ull |lux | | . ) is a scalar ( u x 1) . 7 = 0