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/

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繪畫垂直線
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My Conics
Diagonals of a Rhombus
ch 4 review #6-13
day 83 (3)
ฝึกวาดกราฟ

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Complex Numbers
Difference and Slope
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Linear Functions
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