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Class 12 Three Dimensional Geometry · Mcq Single Correct1 Marksdirection_cosines

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

A directed line is equally inclined to the three positive coordinate axes. Find its direction cosines.

(A) ±(1,1,1)
(B) ±(1,1,1)/√3
(C) ±(1,1,1)/3
(D) ±(1,−1,−1)/√3

✅ Step-by-Step Solution

Final Answer: Option (B): ±(1,1,1)/√3

Equal direction cosines l satisfy 3l²=1.

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