Introduction to Trigonometric Functions

This Introduction to Trigonometric Functions lesson plan also includes:

Scholars first learn the definitions of the sine ratio, the cosine ratio, and the tangent ratio. After mastering these definitions, they use the new information to solve triangles.

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Instructional Ideas

  • Use the resource to introduce sine, cosine, and tangent
Classroom Considerations

  • Learners need access to calculators
  • Pupils should be familiar with the Pythagorean Theorem and special right triangles
  • Note that while the title of the resource includes trigonometric functions, it is about finding trigonometric ratios

  • Auxiliary materials contain a table of trigonometric values in case pupils do not have scientific or graphing calculators
  • Teacher resource includes answer key to all examples and problems

  • None