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If vec(a).vec(b) = vec(a).vec(c ) and ve...

If `vec(a).vec(b) = vec(a).vec(c ) and vec(a) xx vec(b)= vec(a) xx vec(c ) and vec(a) ne vec(0)` then show that `vec(b)= vec(c )`

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The correct Answer is:
`vec(b)=vec(c)`.
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