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RD Chapter 28 Straight line in space Ex 28.2 Solutions

Question - 1 : -

Answer - 1 : -


Question - 2 : -

Showthat the line through the points (1, -1, 2) and (3, 4, -2) is perpendicular to the linethrough points (0, 3, 2) and (3, 5, 6).

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Question - 3 : -

Showthat the line through the points (4, 7, 8) and (2, 3, 4) is parallel to the line through thepoints (-1, -2, 1) and (1, 2, 5).

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Question - 4 : -

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Question - 5 : -

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Question - 6 : -

Showthat the line joining the origin to the point (2, 1, 1) isperpendicular to the line determined by the points (3, 5, -1) and (4, 3, -1).

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Question - 7 : -

Findthe equation of a line parallel to x-axis and passing through the origin.

Answer - 7 : -


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Question - 9 : - 1.
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find the angle between thefollowing pairs of line :

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Question - 10 : - 1.
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find the angle between thepairs of lines with directions ratios proposal to a, b, c and b - c, c - a, a -b.

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