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三角函数定义
Author:
sschy
GeoGebra
New Resources
Variation Theory Parallelogram Proofs
Poorly Drawn Parallelograms 2
Quiz: Finding Average Rate of Change
Blancmange curve (fractal)
Poorly Drawn Parallelograms 3
Discover Resources
Identifying Triangles
Equation for a circle.
Triangle Area (classic)
Fundamental Polygon: Cylinder
Four concyclic triangle centers III
Discover Topics
Conic Sections
Logarithm
Fractions
Standard Deviation
Matrices