Basic Circle Functions

Topic:Circle, Cosine, Functions, Sine, Tangent Function, Trigonometry

David Joyce is a brilliant visual thinker and representer, and he has this great image at the beginning of his trigonometry short course. See the course at http://www.clarku.edu/~djoyce/trig/

New Resources

A note on Erdős’s mysterious remark
bewijs stelling van Pythagoras
רישום חופשי
以竹簽拼砌三角形
Transformations of Triangles and Matrices

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Tangents from an external point
Simulation 4
ConstrTriunghiuriEchivalente.
Polynomials of the form f(x)=ax^n+b
P-Thag
Relation or Function?

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Function Graph
Plane Figures or Shapes
Division
Indefinite Integral
Vectors 3D (Three-Dimensional)