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If (l_(1),m_(1),n_(1)),(l_(2),m_(2),n_(2)) are direction cosines of two lines which inculude an angle 120^(@), then the direction cosines of the line which bisects the angle between them is |
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Answer» `(l_(1)+l_(2)),(m_(1)+m_(2)),(n_(1)+n_(2))` |
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