Question 7: If the angle between vectors A and B is $ heta$, then the…

Question

Question 7: If the angle between vectors A and B is $	heta$, then the value of the product $(B	imes A).A$ is equal to

Accepted Answer

C. zero

B×A will be perpendicular to both A and B.
$$
(B 	imes A).A = (B 	imes A)A \cos 	heta 	ext{ (here } 	heta = 90^\circ	ext{)}
$$
$$
= |B 	imes A| |A| \cos 90
$$
$$
= 0
$$
Hence option c is the answer.

Answer

BA² cos θ

Answer

BA² sin θ

Answer

BA² sin θ cos θ

Question 7: If the angle between vectors A and B is $\theta$, then the value of the product $(B\times A).A$ is equal to