Mathematics Part-II

Book: Mathematics Part-II

Chapter: 11. Three Dimensional Geometry

Subject: Maths - Class 12th

Q. No. 1 of Exercise 11.3

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In each of the following cases, determine the direction cosines of the normal to the plane and the distance from the origin.

5y + 8 = 0

The eq. of the plane

0x-5y + 0z = 8


Direction ratio of the normal (0, -5, 0)




= 5



This is the form of


lx + my + nz = d ( d = Distance of the normal from the origin.)


Direction cosine = 0, -1, 0



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