True or False:

Question 1 If lax b| =4, la| =1 and |b) =2, then the angle between a and b is 30. Not yet answered Select one: Marked out of O True 5.00 O False Flag questionQuestion 2 The vector v = (3,2, -1) is orthogonal to the vector u = (-4,6, -1). Not yet answered Select one: Marked out of O True 5.00 O False Flag questionQuestion 3 If a . b =-1, a =1 and |b| =1, then the angle between a and b is T. Not yet answered Select one: Marked out of O True 5.00 O False Flag questionQuestion 4 If v = (-9,-1,-2) and w = (27,-1,6), then w X v = 0. Not yet answered Select one: Marked out of O True 5.00 O False Flag