Question

prove that a vector dot b vector equals to b vector dot a vector​

Answer 1

Answer:

to prove,

A.B = B.A

we know,

A.B = |A||B|cosØ ....(i)

and,

B.A = |A||B|cos(360 - Ø) ....(ii)

[ because, when you take the direction from B to A, the angle taken would be opp. one, i.e, 360 -Ø]

we know,

cosØ = cos (360 - Ø)

therefore,

(i) = (ii) = |A||B| cosØ

Hence proved :)

Answer 2

that's proof

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