If `bara` and `barb` are unit vectors such that `[bara, barb, baraxxbarb]` is 1/4, then angle between `bara` and `barb` is

If bara,barb,barc are unit vectors such that bara.barb=0,bara.barc and the angle between barb and barc is pi/3 then the value of |bara times barb-bara times barc| is _______

If bara,barb, bara+barb " are unit vectors, then " (bara,barb) =

If three unit vectors bara,barb,barc " satisfy " bara+barb+barc =bar0 then the angle between bara and barb is

If bara and barb be parrallel vectors, then [bara" "barc" "barb]=

If bara.barb=-|vec(a)||vecb| , then the angle between bara and barb is

If bara, barb, barc are unit vectors satisfying bara-sqrt(3)barb+barc=bar0 , then the angle between the vectors bara and barc is :

If bara,barb,barc are unit vectors such that bara is perpendicular to the plane of barb,barc and the angle between barb and barc " is " pi/3 " then find " abs(bara+barb+barc) .

If bara and barb are unit vectors, then the vector ( bara + barb) xx ( bara xx barb) is parallel to the vector

Let bara barb barc be three unit vectors such that |bara+barb+barc|=1 and bara bot barb makes angles a and b with bara and barb respectively then cosa+cosb is equal to