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KVPY2016MathematicsStraight Lines

Let O =(0,0) ; let A and B be points respectively on x -axis and y -axis such that OBA =60^ . Let D be a point in the first quadrant such that OAD is an equilateral triangle. Then the slope of DB is -

Options

  1. A3
  2. B2
  3. C1 2
  4. D1 3

Correct answer

D. 1 3

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