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What is the image of the point (9, -2) after a rotation of 90º counter-clockwise about the origin?
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What is the image of the point (9, -2) after a rotation of 90º counter-clockwise about the origin?

User Md Alamin
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1 Answer

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(X,Y) => (-Y,X) Change the sign of the Y value, and switch.
User Mike Chirico
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