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September 21, 2014

September 21, 2014

Posted by **julie** on Sunday, March 7, 2010 at 4:57pm.

- math -
**MathMate**, Sunday, March 7, 2010 at 7:37pmLet

P=(x0,y0), original position of a point P

P1=(x1, y1), position of P after rotation through an angle θ.

P1=RP

where

R=rotation matrix in two dimensional space about the origin:

cos(θ) sin(θ)

-sin(θ) cos(θ)

For more information, look up:

http://en.wikipedia.org/wiki/Cartesian_coordinate_system

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