Question

the direction ratio of the line is perpendicular to the lines with direction ratio (-1,2,2 ) and (0,2,1)​

Answer 1

Answer: (0,1,-2)

Step-by-step explanation:

The direction ratios of the line perpendicular to both the lines with corresponding direction ratio will be the cross product of the two.

First line A= -i+2j+2k;

Second line B= 2j+k;

Direction ratio of the required line=A×B;

(-i+2j+2k)×(2j+k) = -2k+j +2i-2i

                          =j-2k

                    Direction ratio= (0,1,-2)