If the projection a of a line segment PQ...

If the projection a of a line segment PQ on the coordinate as are 2,3,6, then its direction cosines are

A

2/7,3/7,6/7

B

-2/7,3/7,6/7

C

- 2/7, - 3/7, 6/7

D

2/7, -3/7,-6/7

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The correct Answer is:

A

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