Show that the joint of the points (1,2,3...

Show that the joint of the points (1,2,3), (4,5,7) is parallel to the join of the points (-4,3,-6),(2,9,2).

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NAGEEN PRAKASHAN ENGLISH-THREE-DIMENSIONAL GEOMETRY -Exercise 11 A

Find the direction cosines of that line whose direction ratios are as ...
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Find the direction cosines of the line joining the following points : ...
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Show that the point A(2,-3,-4), B(1,2,3), C(3,-8,-11) are collinear.
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Find the angle between those lines whose direction ratios are as foll...
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Find the angle between the following vectors : (i) veca = 2hati-6ha...
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Show that the joint of the points (1,2,3), (4,5,7) is parallel to the ...
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If A (6,-6,0), B(-1,-7,6), C (3,-4, 4) and D (2,-9,2) be four points i...
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If vecr is a vector of magnitude 21 and has direction ratios 2, -3 an...
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Find the angles which the following vectors, makes form the co-ordinat...
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The pair of lines whose direction cosines are given by the equations 3...
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The direction cosines of two lines satisfying the conditions l + m +...
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If the direction cosines of two lines are l(1), m(1), n(1) and l(2), m...
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Find the angle between any two diagonals of a cube.
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Find the angle between two lines whose direction ratios are proport...
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Find the angles of a triangle whose verties are A(3,2,1), B(35,2) and ...
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If a line makes angles 90o," "135o," "45o with the x, y and z-axes ...
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Find the direction cosines of a line which makes equal angles with ...
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If a line has the direction ratios 18 , 12 , 4, then what are its ...
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Show that the points (2,3,4),(-1,-2,1),(5,8,7) are collinear.
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Find the direction cosines of the sides of the triangle whose vertice...
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