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

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

If A.B=AxxB , then 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 the vectors a and b be such that |a|=3 and |b|=(sqrt(2))/(3) , then axxb is a unit vector, if the angle between a and b is

If three vectors a,b,c are such that a !=0 and a xx b = 2 (a xx c), |a| = |c| = 1, |b| = 4 and the angle between b and c is cos^(-1) (1/4), then b - 2c = lambda a where lambda =

If a+b+c=0" and "abs(a)=3, abs(b)=5" and "abs(c)=7 then the angle between a and b is