If `|A|=2,|B|=5` and `|AxxB|=8.` Angle between A and B is acute, then `(A.B)` is

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

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

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

If A.B =0 and AxxB =1 , then A and B are

If A.B =0 and AxxB =1 , then A and B are

Assertion - If theta be the angle between A and B then tantherta (AxxB)/(AB) Reason - AxxB is perpendicular to AB.

The angle between 3(a xx b) and (1)/(2)(b-(a.b)) is

The angle between a+2b" and "a-3b if abs(a)=1, abs(b)=2 and angle between a and b is 60^(@) is