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in Mathematics by (53.8k points)

The equation of the pair of bisectors of the angles between two straight lines is, 12x2 - 7xy - 12y2 = 0 . If the equation of one line is 2y - x = 0 then the equation of the other line is : 

(A) 41x - 38y = 0 

(B) 11x + 2y = 0 

(C) 38x + 41y = 0 

(D) 11x – 2y = 0

1 Answer

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Best answer

(A) 41x - 38y = 0 

(2y - x) (y - mx) = mx2 - xy (2m + 1) + 2y2 = 0  the equation to the pair of bisectors are :

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