Exact Trigonometric Ratios: Triangles to the Unit Circle

Special right triangles give special information. Individuals learn how to find trigonometric ratios in all quadrants. This involves using special right triangles and the Pythagorean Theorem.

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CCSS: Designed
Instructional Ideas

  • Have the class come up with their own mnemonics for the signs of trigonometric ratios in each quadrant
Classroom Considerations

  • Pupils should be familiar with trigonometric ratios
  • Learners must be able to apply the Pythagorean Theorem
Pros

  • Provides a homework sheet for the lesson
  • Includes links to outside resources
Cons

  • None
Common Core