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Sine, Cosine, Tangent 0 - 360°

作者：Lee W Fisher
主題：餘弦, 正弦
Control the angle to see the red, green and blue line segments change length.
https://tentotwelvemath.com/fmp-10/soh-cah-toa-resources/visual-trig-values/  https://tentotwelvemath.com/grade-11/grade-11-precalculus/2-trigonometry/the-unit-circle/

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