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Show that the scalar product of two vec...

Show that the scalar product of two vectors obeys the law of commutative .

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If `theta ` is the angle between `vec(A) and vec(B)` then scalar product
`vec(A).vec(B) = Ab cos theta `
` = BA cos theta " " [ :. AB = BA ] `
` :. Vec(A) .vec(B) = vec(B) .vec(A) `
This simply means that the order of vectors in the scalar product does not matter .
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