The Pythagorean Identity – Playlist and Teaching Notes

In this playlist, students explore standard HSF.TF.C.9. They learn how to prove the Pythagorean identity and find the value of other trigonometric functions given the value of sin(θ ), cos(θ ), or tan(θ ) and the quadrant of the angle. Students also have the option to view instructional videos and complete practice quizzes or activities.

The playlist includes:
• Links to ten instructional videos or texts
• Links to two practice quizzes or activities
• Explanation of the trigonometric function
• Definitions of key terms, such as Pythagorean identity

Accompanying Teaching Notes include:
• Review of key terminology
• Links to video tutorials for students struggling with certain parts of the standard, such as proving the Pythagorean identity
• Links to additional practice quizzes or activities on certain parts of the standard, such as understanding the Pythagorean identity

For more teaching and learning resources on standard HSF.TF.C.9, visit



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  • Demo_pdf_WN_MATH_0177.pdf
  • ThePythagoreanIdentityPlaylistandTeachingNotes-(1).zip

About this resource


Created: Oct 31, 2016

Updated: Feb 22, 2018

Lesson Plan

pdf, 681 KB


Lesson Plan

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