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MHT CET202123 Sep 2021Morning ShiftMathematicsPair of LinesActual

If the lines represented by a x^2-b x y-y^2=0 make angle and with the positive direction of X -axis, then ( + )=

Options

  1. Aa a+b
  2. Bb 1+ b
  3. Cb 1+ a
  4. D-b 1+a

Correct answer

D. -b 1+a

Step-by-step solution

and are roots of the a x^2-b x y-y^2=0 aligned & + = -(- b ) -1 =- b and = a (-1) =- a & ( + )= + 1- = - b 1-(- a ) = - b 1+ a aligned

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