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Unit Circle, Argument, Cis, Polar Form

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Explanations 1

Let cos⁡a=x,sin⁡a=y\cos a= x, \sin a= ycosa=x,sina=y. Then x2+y2=1x^2+y^2=1x2+y2=1. Ok, so we've found that each point on the unit circle can be expressed in the form (cos⁡a,sin…
By Vincent Huang