math

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What is the rule for finding coordinates after a 90 degree rotation?

after a 180 degree rotation? after a 270 degree rotation?

  • math -

    Assume a circle with a radius of i(r=1)

    @ 0 Degrees: = 1, and Y = 0.

    @ 90 Degrees: X = 0, and Y = 1.

    @ 180 Degrees: X = -1, and Y = 0.

    @ 270 Degrees: X = 0, and Y = -1.

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