Q. 84.0( 4 Votes )

A line is perpendicular to two lines having direction ratios 1, -2, -2 and 0, 2, 1. The direction cosines of the line are



D. none of these

Answer :

If a line is perpendicular to two given lines we can find out the parallel vector by cross product of the given two vectors.

So the direction cosines are

Direction cosine

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