Lines `OA, OB` are drown from `O` with direction cosines proportinal to `1,-2, -1;3 -2,3.` Find the direction cosines of the normal to the plane `AOB.`

Find the direction cosines of the normal to YZ plane?

Find the direction cosines of the normal to the plane y=3 .

Find the direction cosines of the normal to the plane 3x+4=0 .

Lines bar(OA),bar(OB) are drawn from O with direction cosines proportional to (1,-2,-1), (3,-2,3). Find the direction cosines of the normal to the plane AOB.

The direction cosines of a normal to the yz-plane are

The directions cosines of the normal to the plane 2x-y +2z =3 are

Lines OA and OB are drawn from O with directioncosines proportional to (1,-2,-1) and (3,-2,3) respectively. The direction ratios of the normal to the planes AOB are (A) (4,3,2) (B) (4,-3,-2) (C) (-4,3,-2) (D) (4,3,-2)

Lines OA and OB are drawn from O with directioncosines proportional to (1,-2,-1) and (3,-2,3) respectively. The direction ratios of the normal to the planes AOB are (A) (4,3,2) (B) (4,-3,-2) (C) (-4,3,-2) (D) (4,3,-2)

Direction Cosines of a normal to the XOY - plane are

The direction cosines of any normal to the plane XY-plane are