List of top Mathematics Questions on Addition of Vectors asked in BITSAT

Let a, b, c be non-coplanar unit vectors equally inclined to one another at an acute angle θ. Then | a+ b+ c| in terms of θ is equal to
With respect to a rectangular Cartesian coordinate system, three vectors are expressed as a = 4 i- j, b=-3 i+2 j and c=- k. The unit vector along the direction of sum of these vectors is