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4.6兩角和與差的正弦、餘弦、正切二
Author:
user9429
GeoGebra
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双心四边形
圓周公式的應用
讀磅
【案例】2018年全国1卷理科12题
直線的斜率：水平變化 & 鉛垂變化
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直線交點
test
硬幣繞多邊形面積
Trigonometric Relations(180,360)
limit of function f(x)=x^2
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Tree Diagrams
Mathematics
Complex Numbers
Fractions
Solids or 3D Shapes