engineering recuitment NCRTC Station Controller Mock Test 2021 Mathematics Vector Algebra Scalar and Vector Product
If \(\vec a{\rm\:{and}}\:\vec b\) are unit vectors and θ is the angle between them, then \(\left| {\frac{{\vec a\; - \;\vec b\;}}{2}} \right|\) is
1
sin (θ/2)
2
sin θ
3
2 sin θ
4
sin 2θ