defence exam Army Havildar SAC Mock Test Series 2025 Mathematics Lines

The angle between the lines represented by x2 - 2xy - y2 + 2x + 3y - 1 = 0 is-

1
\(\dfrac{\pi}{2}\)
2
tan-1 (1/2)
3
tan-1 (1/4)
4
\(\dfrac{\pi}{4}\)
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