If a line makes angles x, , Y with the co-ordinate axes, then 2 + 2 + 2 is
Mathematics · JEE Main · NTA Exams — Three Dimensional Geometry
If a line makes angles \(x, \beta, Y\) with the co-ordinate axes, then \(\cos 2 \pi+\cos 2 \beta+\cos 2 \gamma\) is
- -1
- -2
- 2
- -3
Answer
(A) -1
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