Question

What are direction cosines.????????????​

Answer 1

Step-by-step explanation:

these are the direction cosine

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Answer 2

Answer:

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If α, , β γ are the angles made by a directed line segment with the positive

directions of the coordinate axes respectively, then cos a, cos b, cos g are called the direction cosines of the given line and they are denoted by l, m, n respectively

Thus l = α cos , m = cos , β n = cos γ

The direction cosines of op- are

l = α cos , m = cos , β n = cos γ .

If l, m, n are the d.c’s of a line L is one direction then the d.c’s of the same line in the opposite direction are –l, –m, –n.

Note : The angles α, , β γ are known as the direction angles and satisfy the

Note : The angles α, , β γ are known as the direction angles and satisfy the condition 0 ,, ≤ α β γ ≤ π .

Note : The sum of the angles α, , β γ is not equal to 2p because they do not lie in the same plane.

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