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叶卢庆，1992年出生。现为高中数学教师，目前任教于浙江省永嘉中学。
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两角和与差的余弦、正弦公式(动画2)
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两角和与差的余弦、正弦公式(动画3)
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两角和与差的余弦、正弦公式(动画4)
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两角和与差的余弦、正弦公式(动画1)
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祖暅原理求球体体积
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Superposition of hamonic vibration
Hilde.DeBeuckeleer
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Angle Estimation Warmup
Andrew Knauft
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right triangle paradox
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SSA triangle: The Ambiguous Case
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Least Squares
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AQR Section 17: Mean but Sensitive
Steve Phelps
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AQR Section 17: Where's the Mean?
Steve Phelps
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Exponential or Logistic Function that…
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Roy Wright
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Lower and Upper Sum of a Function
GeoGebra Materials Team
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Duane Habecker
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Michael Borcherds
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05.1 Measures of Central Tendency
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Hilbert curve
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Inclined Plane with Two Masses and a …
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Ethan Hall
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Michael Borcherds
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Linda Fahlberg-Stojanovska
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Triangle Paradox (Missing square puzzle)
Michael Borcherds
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