If `|hata+hatb|=|hata-hatb|`, then find the angle between `veca and vecb`

If hata,hatb and hatc are three unit vectors satisfying hata-sqrt3hatb+hatc=hat0 then find the angle between hata and hatc .

If vector (hata+ 2hatb) is perpendicular to vector (5hata-4hatb) , then find the angle between hata and hatb .

If vector (hata+ 2hatb) is perpendicular to vector (5hata-4hatb) , then find the angle between hata and hatb .

If vector (hata+ 2hatb) is perpendicular to vector (5hata-4hatb) , then find the angle between hata and hatb .

If hata.hatb=1/2 then what is the angle between hata and hatb ?

Let hata,hatb,hatc be unit vectors. Suppose that and the angle between hata*hatb = hata*hatc = 0 and the angle between hatb and hatc is pi/6.

If hata, hatb, hatc are three units vectors such that hatb and hatc are non-parallel and hataxx(hatbxxhatc)=1//2hatb then the angle between hata and hatc is

If hata, hatb, hatc are three units vectors such that hatb and hatc are non-parallel and hataxx(hatbxxhatc)=1//2hatb then the angle between hata and hatc is

Two non-collinear unit vectors hata and hatb are such that | hata + hatb | = sqrt3 . Find the angle between the two unit vectors.