If `A.B=AxxB`, then angle between `A` and `B` is

If AxxB=BxxA then the angle between A and B is

If a and b are two vectos such that a.b lt 0 and |a.b|=|axxb| , then the angle between a and b is

Let A,B,C be three unit vectors and A.B= A.C=0. If the angle between B and C is pi/6 , then A is equals to

Let A,B and C be the unit vectors . Suppose that A.B=A.C =0 and the angle between B and C is (pi)/(6) then prove that A = +-2(BxxC)

Let A,B and C be the unit vectors . Suppose that A.B=A.C =0 and the angle between B and C is (pi)/(6) then prove that A = +-2(BxxC)

Let A,B and C be the unit vectors . Suppose that A.B=A.C =0 and the angle between B and C is (pi)/(6) then prove that A = +-2(BxxC)

If vec(A) and vec(B) denote the sides of a parallelogram and its area is AB/2 , the angle between vec(A) and vec(B) is :-

Vectors a and b are such that |a|=1,|b|=4 and a.b=2." If " c=2axxb-3b , then the angle between b and c is