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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

8 years ago

Answers : (2)

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

8 years ago
vijesh jayan
49 Points
							

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

8 years ago
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