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smileandbehappy
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Homework Statement
A point with coordinates x and y is rotated in an anticlockwise direction through an angle z, so that its distance from the origin of the coordinate system remains constant. Show that the new x and y coordinates become
xcosz - ysinz and xcosz + ysinz respectively.
Homework Equations
The Attempt at a Solution
Well I am looking for some advice on how to start this! The wording is confusing to me! To my mind surely if you rotate a point it will be exactly the same? Any help would be supremely appretiated.