Eric Arnebäck on Twitter: "Below, I have written down a concise and sweet derivation of the 2D rotation matrix, for future reference. Following this, the 3D rotation matrices can easily be derived,
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Rotation Transformation Matrix
Using Matrices to Complete Rotations - Video & Lesson Transcript | Study.com
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Matrix rotation by 90 degrees clockwise and anticlockwise
Rotation matrix - Wikipedia
Rotation matrix
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Rotate Image - LeetCode
