MHT CET 2025 Mathematics question
The equation , where is real number, represents pair of lines. If is acute angle between the lines, then
Answer: (D)
Solution
Compare with ax^2+2hxy+by^2+2gx+2fy+c=0: , , , , , . Pair of lines requires abc+2fgh-af^2-bg^2-ch^2=0:
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