Which set CANNOT be direction cosines of a vector?

Type: MCQ • Marks: 1

A. (1, 1, 0)

B. (0, -1, 0)

C. (0, 0, 1)

D. (1, 0, 0)

Explanation

The sum of squares for (1,1,0) is 2, not 1. All other listed triples have sum of squares 1.

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