Assertion (A) : A line in space cannot be drawn perpendicular to x, y and z axes simultaneously. Reason (R) : For any line making angles, α, β, γ with the positive directions of x, y and z axes respectively, cos² α + cos² β + cos² γ = 1.

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Assertion-ReasonThree Dimensional Coordinate SystemDirection Cosines of a LineCBSE PYQ

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