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What are the formulas for a 90, 180, 270, and 360 rotation?
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What are the formulas for a 90, 180, 270, and 360 rotation?

User Evan Fosmark
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formulas: 90 = (b, -a),180 = (-a, -b); 270 = (-b, a); 360 = (a, b).
User Danylo Korostil
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