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AP EAMCET201726 Apr 2017Evening ShiftMathematicsStraight LinesActual

When the coordinate axes are rotated through an angle 4 in the positive direction, an equation is transformed to x^2+y^2-6 x+8 y+21=0 . Then that original equation is

Options

  1. Ax^2+y^2-7 2 x+ 2 y+21=0
  2. B2 x^2+ 2 y^2-7 x+y+21 2 =0
  3. Cx^2+y^2-14 x+2 y+21=0
  4. Dx^2+y^2-7 2 x+ 2 y+21 2 =0

Correct answer

A. x^2+y^2-7 2 x+ 2 y+21=0

Step-by-step solution

No solution. Refer to answer key.

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