1. The problem statement, all variables and given/known data 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. 2. Relevant equations 3. The attempt at a solution Well im 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.