Instructional Video

Intro to Trigonometric Ratios

Curated and Reviewed by Lesson Planet

Finding trigonometric ratios is relatively easy; you just have to know where to look. The first installment of a 16-part video playlist shows how to find the sine, cosine, and tangent values for a given angle. It shows how to find the values from a table and by using a calculator.

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CCSS: Adaptable
Additional Tags
Instructional Ideas
  • Provide some exercise problems for the class to complete
Classroom Considerations
  • Note that the video refers to 0 as naught
  • Calculator shown in the resource is a scientific calculator; be sure learners can find trig values on their own calculators
  • This video is hosted on YouTube
  • Clear step-by-step explanations make it easy for students of all levels to understand
  • Does not teach what trigonometric ratios mean