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Unit Circle and Sine Function by ayoob

Unit Circle and Sine Function by ayoob
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2012-06-08 21:50
CircleFunctionTrigonometryGeometric ConstructionGraphing
This example demonstrates the relationship between points on the unit circle and the sine function graph. Core math concepts include the unit circle, trigonometric functions, sine function, angles, and coordinates. Construction highlights involve GeoGebra commands/objects like Point, Circle, Intersect, Rotate, Angle, Segment, OrthogonalLine, and Ray. Suitable for high school students learning about the generation process of trigonometric function graphs.

GeoGebra Commands & Parameters

  1. Point(xAxis) → A
  2. Circle(A, 1) → c
  3. Intersect(c, xAxis, 2) → B
  4. Rotate(B, α, A) → P
  5. Angle(B, A, P) → β
  6. Segment(A, P) → a
  7. OrthogonalLine(P, xAxis) → b
  8. Intersect(b, xAxis) → C
  9. Segment(C, P) → g
  10. Ray(H, U) → q
  11. Ray(I, V) → r
  12. Segment(V, U) → l
  13. Segment(X, W) → m
  14. Segment(Z, Y) → n
  15. Segment(G, F) → p
  16. Segment(J, K) → s
  17. Segment(K, O) → t
  18. Segment(K, Q) → a_1
  19. Segment(M, A_1) → b_1
  20. Segment(M, B_1) → c_1
  21. Segment(J, C_1) → d_1
  22. Segment(J, D_1) → e_1
  23. Segment(L, N) → f_1
  24. Segment(L, E) → g_1
  25. Segment(M, M') → h_1