If θ be the angle between vector A and vector B, then value of (vector B x vector A)

Question

If θ be the angle between \(\overset{\rightarrow}A\) and \(\overset{\rightarrow}B\), then value of \((\overset{\rightarrow}B\times\overset{\rightarrow}A).\overset{\rightarrow}A\) will be:

(a) \(BA^2\sinθ\)

(b) \(BA^2 \cosθ\)

(c) zero

(d) \(BA^2 \sinθ \cosθ\)

Answer 1

Correct option is : (c) zero