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Introduction to Trig Ratios by D.Wilson

Introduction to Trig Ratios by D.Wilson
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2019-07-31 08:40
AngleTrigonometryGeometric Construction
This example demonstrates the definitions and geometric meanings of trigonometric functions (sine, cosine, tangent) in right-angled triangles. It involves core math concepts like trigonometric functions, right triangles, side-angle relationships, and angle measurement. GeoGebra commands used in construction include Intersect, Point, Rotate, Angle, Line, OrthogonalLine, and Segment. Suitable for middle school students and above to learn basic trigonometry or for geometric visualization.

GeoGebra Commands & Parameters

  1. Intersect(xAxis, yAxis) → A
  2. Point(xAxis) → B
  3. Rotate(B, θ, A) → B'
  4. Angle(B, A, B') → θ_1
  5. Line(B', A) → a
  6. OrthogonalLine(B, xAxis) → b
  7. Intersect(a, b) → C
  8. Segment(A, B) → c
  9. Segment(B, C) → d
  10. Segment(C, A) → e
  11. Angle(C, B, A) → γ