find the vector at should be added to the sum of (i - 5j + 4k) a (5i+7j-5k) to give a unit vector along the x-axis
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Explanation:
It is given in question that resultant vector R is unit vector along y-axis.
So, R = 0i + j + 0k.
A + B + X = R
X = R -( A + B)
= 0i + j + 0k -( 3i -5j + 7k + 2i +4j-3k)
= 0i + j + 0k -5i +j -4k
= -5i +2j -4k (Ans)
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