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External tangent
Author:
jaycheung2016plk
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y=sin x->y=sin(2x+pi/3)
正方体展开图
Geogebra 入门
探索三角函数的图像
內積
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題 2
判斷球體 6
西姆松定理推廣(西姆松圓)
未命名
Diagram 1
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Probability
Parallelogram
Ellipse
Perimeter
Trapezoid
