Instructional Video

Inverse Trig Ratios

Curated and Reviewed by Lesson Planet

Put trigonometric ratios into inverse. Scholars learn how to find an unknown angle in a right triangle by using inverse trigonometric ratios. The pupils understand how the inverses undo a trigonometric ratio to provide the angle measure. With the knowledge, they practice finding unknown angles in multiple triangles given lengths of two and three sides.

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CCSS: Adaptable
Instructional Ideas
  • Ask class members to label the sides of the triangle as the opposite, adjacent, and hypotenuse to help them understand which trig ratio to use
Classroom Considerations
  • Lesson five of six in a right triangles series 
  • Assumes knowledge of the three main trigonometric ratios
  • This video is hosted on YouTube
Pros
  • Contains application and extension problems
  • Shows the steps to use on the calculator to find the inverse trigonometric ratio
Cons
  • None