Three Dimensional Geometry
If the image of the point P(1,−2,3)in the plane, 2x+3y−4z+22=0measured parallel to the line, 1x−4y−5zis Q, then PQis equal to : 42 (2) 65 (3) 35 (4) 342
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Find the acute angle between the following planes.x+y−2z=6 and 2x−2y+z=11.
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