trigonometry - Trouble visualizing sin and cos - Mathematics Stack

I'm working on building tetris now in Java and am at the point of rotations I originally hardcoded all of the rotations, but found that linear algebra was the better way to go. I'm trying to u

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Desmos Atan2, This means, that the roll angle would be always zero.

Helpful visualisation of trigonometric functions. : r/math

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