Question

The vector a = αi + 2j + βk lies in the plane of the vectors b =i + j and c = j + k and bisects the angle between  vector b and  vector c . Then which one of the following gives possible values of α and β? 

(A) α = 2, β = 2 

(B) α = 1, β = 2 

(C) α = 2, β = 1 

(D) α = 1, β = 1

Answer 1

Answer is (D) α = 1, β = 1