What are the direction cosines (l, m, n) of the directed vector (2, -1, 2)?

Type: MCQ • Marks: 1

A. (-2/3, 1/3, -2/3)

B. (2/3, -1/3, 2/3)

C. (2/9, -1/9, 2/9)

D. (2, -1, 2)

Explanation

Divide the x-, y-, z-components by the magnitude 3. Thus (l,m,n)=(2/3, -1/3, 2/3); their squares sum to 1.

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