If 1,m ,n are the direction cosines of t...

If 1,m ,n are the direction cosines of the line of shortest distance between the lines `(x-3)/(2) = (y+15)/(-7) = (z-9)/(5) and (x+1)/(2) = (y-1)/(1) = (z-9)/(-3) ` then :

A

`31-1 5m + 9n =0`

B

`2l -7m + 5n =0`

C

`1=m =n=1 //sqrt3`

D

`21+m -3n =0`

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The correct Answer is:

B, C, D

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