S3M2: Sine, cosine, and the unit circle

Argomento:Circonferenza, Coseno, Seno, Circonferenza unitaria

Move the red point on the unit circle. What is the connection between the coordinates of the point and the values of the trigonometric functions of the angle? Why?

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Billard V5.2 and V6
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Linear Systems + Relationships Between Coefficients and Solutions

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Car, River, Campfire
cubica
Difference of two line segments
does it converge?
Improper Fraction
Cosine Ratio

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Coordinate
Ellisse
Trasformazioni geometriche
Funzioni
Limiti