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Class 12 Three Dimensional Geometry · Mcq Single Correct1 Marksdirection_cosines

Class 12 Maths · Three Dimensional Geometry · Mcq Single Correct #63

A directed line makes angles α,β,γ with the positive axes. Its direction cosines are:

(A) (sin α,sin β,sin γ)
(B) (cos α,cos β,cos γ)
(C) (tan α,tan β,tan γ)
(D) (cos²α,cos²β,cos²γ)

✅ Step-by-Step Solution

Final Answer: Option (B): (cos α,cos β,cos γ)

Direction cosines are the cosines of the three coordinate angles.

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