Find the direction cosines of the line w...

Find the direction cosines of the line which is perpendicular to the lines with direction cosines proportional to `(1, -2, -2) and (0, 2, 1)`.

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The correct Answer is:

`((2)/(3), -(1)/(3), (2)/(3)) or ((-2)/(3), (1)/(3), (-2)/(3))`

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