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Show that the scalarproduct of two vectorsobeysthe lawof commutative. |
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Answer» Solution :If `theta `is the ANGLEBETWEEN `vec(A) and vec(B)` then scalarproduct `vec(A).vec(B) = AB cos theta` ` = BA cos theta"" [ :. AB = BA ] ` ` :.Vec(A) .vec(B) = vec(B) .vec(A) ` This SIMPLY meansthat the orderof VECTORS in the SCALAR productdoes not matter . |
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