[" Which of the following is a unit "],[" vector "]

Which of the following is not a unit vector ?

Let vec(a),vec(b),vec(c ) be unit such that hat(a) + hat(b ) + hat(c ) = vec(alpha) and hat(a).hat(b)=hat(b).hat(c ) =hat(c ). hat(a) = 1/2 Which of the following is not a unit vector ?

Which of the followingis a unit vector ?

Which of the followingis a unit vector ?

Which of the following represents a unit vector ?

Which of the following represents a unit vector ?

Two vectors vecP and vecQ are inclined to each other at angle theta . Which of the following is the unit vector perpendicular to vecP and vecQ ?

Two vectors vecP and vecQ are inclined to each other at angle theta . Which of the following is the unit vector perpendicular to vecP and vecQ ?

Two vectors vecP and vecQ are inclined to each other at angle theta . Which of the following is the unit vector perpendicular to vecP and vecQ ?