DID 64 Chapter: Three Dimensional Geometry Class XIl
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Questions and Answers

What is the moving power of mathematical invention according to A. DeMorgan?

  • Imagination (correct)
  • Logic
  • Analysis
  • Reasoning
  • In which dimension were the methods confined to while studying Analytical Geometry according to the text?

  • Four dimensions
  • One dimension
  • Three dimensions
  • Two dimensions (correct)
  • What are the angles made by a directed line L passing through the origin with x, y, and z-axes called?

  • Direction angles (correct)
  • Coordinate angles
  • Direction ratios
  • Direction cosines
  • What concept is used to study the direction cosines and direction ratios of a line joining two points in three-dimensional geometry?

    <p>Vector algebra</p> Signup and view all the answers

    What did Leonhard Euler contribute to the study of direction cosines and direction ratios of a line?

    <p>Developed vector form concepts</p> Signup and view all the answers

    Which approach to three-dimensional geometry is described as making the study simple and elegant in the text?

    <p>Vector algebra</p> Signup and view all the answers

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