If angle between `vec a` and `vec b` is `pi/3` then angle between `vec a` and `-2vec b` is:

If vec a,vec b,vec c are 3 unit vectors such that vec a xx(vec b xxvec c)=(vec b)/(2) then (vec b and vec c being non parallel).(a)angle between vec a&vec b is (pi)/(3) (b)angle between vec a and vec c is (pi)/(3)( c)angle between vec a and vec b is (pi)/(2) (d)angle between vec a and vec c is (pi)/(2)

Angle between vec(a) and vec(b) is 60^(@) then

If |vec a|=|vec b|=|vec a-vec b| then the angle between vec a and vec b is

If vec a,vec b,vec c are unit vectors such that vec a*vec b=0=vec a*vec c and the angle between vec b and vec c is pi/3, then the value of |vec a xxvec b-vec a xxvec c| is 1/2 b.1 c.2 d.none of these

If |vec a xxvec b|=|vec a*vec b|, then find angle between vec a and vec b

Let vec a,vec b,vec c are the three vectors such that |vec a|=|vec b|=|vec c|=2 and angle between vec a and vec b is (pi)/(3),vec b and vec c and (pi)/(3) and vec a and vec c(pi)/(3). If vec a,vec b and vec c are sides of parallelogram

if |vec a|=4,|vec b|=2 and the angle between vec a and vec b is (pi)/(6) then (vec a xxvec b)^(2) is equal to

If vec a and vec b are unit vectors find the angle between vec a+vec b and vec a-vec b

If the angle between the vectors vec(a) and vec(b) is (pi)/(3) , what is the angle between -5vec(a) and 6 vec(b) ?

If |vec a|=3,|vec b|=5,|vec c|=7 and vec a+vec b+vec c=0 then angle between vec a and vec b is