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Q.The pair of lines x2+xy−6y2=0x^2 + xy - 6y^2 = 0 are rotated about the origin by θ\theta in anticlockwise sense. The equation of the pair in new position is unchanged if

a
θ=π/3\theta = \pi/3
b
θ=π/2\theta = \pi/2
c
θ=π/6\theta = \pi/6
d
θ=π/4\theta = \pi/4

Correct Answer: Option B

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The pair of lines x^2 + xy - 6y^2 = 0 are rotated about th... | ParikshaNiti