1
IAT (IISER) 2023
MCQ (Single Correct Answer)
+4
-1
Let $L$ be a straight line passing through the origin, and it makes angles $\alpha, \beta$ and $\gamma$ with the positive $X, Y$ and $Z$-axes, respectively. What is the value of $\cos 2 \alpha+\cos 2 \beta+\cos 2 \gamma$ ?
Questions Asked from Three Dimensional Geometry (MCQ (Single Correct Answer))
Number in Brackets after Paper Indicates No. of Questions
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