If is the angle between the lines whose direction cosines are given by 6mn-2nl+5lm=0 and 3l+m+5n=0, then =

MHT CET 2025 Mathematics question

If is the angle between the lines whose direction cosines are given by and , then

Answer: (A)

From , . Substitute in : . Case 1: , , direction ratios . Case 2: , , direction ratios . Each

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Question ID VK-102417