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Show that the origin lies in the interio...

Show that the origin lies in the interior of the acute angle between planes. `x+2y+2z+9` and `4x-3y+12z+13=0`, Find the equation of bisector of the acute angle.

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MBD PUBLICATION-THREE DIMENSIONAL GEOMETRY-QUESTION BANK
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  4. Prove that the line joining (1,2,3),(2,1,-1) intersects the line joini...

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