In my Trig class, we learned about the unit circle and its relationship to the various trig functions (sin, cos, etc.).(adsbygoogle = window.adsbygoogle || []).push({});

I am curious to know why the unit circle works the way it does, and the how it was "derived" so to speak.

More specifically, why does radius of the circle have to be 1 for the circle to work.

Please try to keep your explanations as mathematically friendly as possible, as I am only in precalculus.

Thank you

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# Why does the Unit Circle work?

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