1.

Let l_(1),m_(1),n_(1),l_(2),m_(2),n_(2) and l_(3),m_(3), n_(3) are direction cosine of three mutually perpendicular line OA, OB and OC.If the direction cosines of OP are proportional to l_(1)+l_(2)+l_(3), m_(1)+m_(2)+m_(3), n_(1)+n_(2)+n_(3)and angle made by OP with lines OA, OB, OC are respectively theta_(1), theta_(2), theta_(3), then

Answer»

`theta_(1) LT theta_(2) lt theta_(3)`
`theta_(1)=theta_(2)=theta_(3)`
`theta_(1) gt theta_(2) gt theta_(3)`
`theta_(1)=theta_(2)+theta_(3)`

Answer :B


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