Q. 8

Show that the line is parallel to the plane Also, find the distance between them.

Answer :

Given - and


To prove – The line and the plane are parallel &


To find – The distance between them


Direction ratios of the line = (1, 3, 4)


Direction ratios of the normal of the plane = (1, 1, - 1)


Formula to be used – If (a, b, c) be the direction ratios of a line and (a’, b’, c’) be the direction ratios of the normal to the plane, then, the angle between the two is given by


The angle between the line and the plane






Hence, the line and the plane are parallel.


Now, the equation of the plane may be written as x + y - z = 7.


Tip – If ax + by + c + d = 0 be a plane and be a line vector, then the distance between them is given by


The distance between the plane and the line




units


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