If A is a unit vector in a given direction then the value of `hatA.(dhatA)/(dt)` is

Find a unit vector hata .

If hata and hatb are two unit vectors inclined at an angle theta , then the value of |hata-hatb| is -

The unit vector in the direction of a given vector vec(a) is-

If hata_(1) and hata_(2) are two non collinear unit vectors inclined at 60^(@) to each other then the value of (hata_(1)-hata_(2)).(2hata_(1)+hata_(2)) is

Find unit vector in the direction of vector vec a = 2 hata i+3hat j+hat k

If hata" and "hatb are non-collinear unit vectors and if |hata+hatb|=sqrt(3) , then the value of (2hata-5hatb).(3hata+hatb) is :-

If hata" and "hatb are non-collinear unit vectors and if |hata+hatb|=sqrt(3) , then the value of (2hata-5hatb).(3hata+hatb) is :-

If hata" and "hatb are non-collinear unit vectors and if |hata+hatb|=sqrt(3) , then the value of (2hata-5hatb).(3hata+hatb) is :-