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Grade: 11

                        

if the angle between the vectors A and B is @ ,the value of the product (B x A).A is equal to (a) BA^2sin@ (b) BA^2cos@ (c) BA^2cos@sin@ (d) zero i wanted the solution also waiting for ur reply @ as theta ^2 as to the power of

9 years ago

Answers : (3)

vikas askiitian expert
509 Points
							

let BxA = R

BxA is a vector which is perpendicular to both B & A ...

(BxA).A = R.A

R perpendicular to A so dot product will be 0 ...            (dot product of any two perpendicular vectors is 0)

so , (BxA).A =0

opton d) is correct

9 years ago
vijesh jayan
49 Points
							

thanks bro!!!!!!!!!!!!!!!!!!!!!!!!!

9 years ago
Rishi Sharma
askIITians Faculty
614 Points
							Dear Student,
Please find below the solution to your problem.

let BxA = R
BxA is a vector which is perpendicular to both B & A ...
(BxA).A = R.A
R perpendicular to A so dot product will be 0 ... (dot product of any two perpendicular vectors is 0)
so , (BxA).A =0

Thanks and Regards
4 months ago
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