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If A(3,2,-4),B(4,3,-4),C(3,3,3) and D(4,...

If `A(3,2,-4),B(4,3,-4),C(3,3,3)` and `D(4, 2,-3)` are given then find the projection of `vec(AD)` on `vec(AB)xx vec(AC)`.

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The correct Answer is:
`((56)/(99),(-56)/(99),(8)/(99))`
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