Trigonometry

Laura Kinnel


  • 1. Traveling around the Unit Circle
  • 2. Unwrapping a Circle
  • 3. Unwrapping a Circle
  • 4. Ferris Wheel
  • 5. Writing Equations for Trigonometric Functions
  • 6. Ferris Wheel
  • 7. Sine & Cosine of a Sum: Discovery
  • 8. Proving the Cosine of a Difference Identity
  • 9. Periodic Function Action!

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Traveling around the Unit Circle

Choose your character by sliding the white dot in the gray box. Then move your character around the circle by sliding the red dot or by clicking on the red dot and then using the left and right arrow keys. Determine the length of the path your character has traveled wherever you decide to stop.
– Laura Kinnel

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