• F04118F@feddit.nl
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      4 hours ago

      It was freely chosen for simplicity.

      If you choose another R, the other sides (x and y) become R*cos(th) and R*sin(th)

      I don’t understand what is harmful about the unity circle either.

    • bizarroland@fedia.io
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      4 hours ago

      Any circle could have its radius technically be 1, as long as you set the units of measurement so that 1 equals the radius of the circle.