School of Mathematics and Statistics, The University of Sydney
 6. Cartesian and polar coordinates in two dimensions
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Glossary
Examples

The length of a vector in terms of components

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When Q has coordinates (x,y), the length of the vector - --> OQ in the XOY plane is  V~ --------   x2 + y2.

  Y                  Q S     V~ --------  y   x2 + y2     y                          X O        x     R

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