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AP EAMCET2005MathematicsThree Dimensional Geometry

The direction cosines of the line passing through P(2,3-1) and the origin are

Options

  1. A2 14 , 3 14 , 1 14
  2. B2 14 , -3 14 , 1 14
  3. C-2 14 , -3 14 , 1 14
  4. D2 14 , -3 14 , -1 14

Correct answer

C. -2 14 , -3 14 , 1 14

Step-by-step solution

The direction cosines of O P aligned & = ( -2 4+9+1 , -3 4+9+1 , 1 4+9+1 ) & = ( -2 14 , -3 14 , 1 14 ) aligned

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