Learning the quick way to rotate a point 90 degrees counter clockwise

The video tutorial demonstrates a simple trick using a scratch piece of paper to visualize point rotation, particularly a 90-degree counterclockwise rotation. The instructor explains how to use this method to determine the new position of a point after rotation. The mathematical concept of swapping coordinates and making the Y-coordinate negative is also discussed, providing a clear understanding of the rotation process.

What is the significance of the transparency of the paper in the rotation demonstration?

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Explain the process of swapping coordinates and changing the sign of the Y coordinate during rotation.

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