If A(3, 5, -4), B(-1, 1, 2) and C(-5, -5, -2) are the vertices of `Del – InterviewSolution

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1.	If A(3, 5, -4), B(-1, 1, 2) and C(-5, -5, -2) are the vertices of `Delta` ABC, then the direction cosines of side AC areA. `(2)/(sqrt(17)), (2)/(sqrt(17)), (-3)/(sqrt(17))`B. `(2)/(sqrt(17)),(3)/(sqrt(17)),(2)/(sqrt(17))`C. `(4)/(sqrt(42)), (5)/(sqrt(42)), (-1)/(sqrt(42))`D. `(-4)/(sqrt(17)), (-5)/(sqrt(17)), (1)/(sqrt(17))`
Answer» Correct Answer - C

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