Objective
To use the Pythagorean theorem to make a trig identity using sin x and cos x.
Web Resources
http://www.regentsprep.org/Regents/math/algtrig/ATT9/pythagoreanid.htm Great visual notes with simple examples.
http://www.coolmath.com/precalculus-review-calculus-intro/precalculus-trigonometry/29-the-pythagorean-identities-01.htm Colorful notes for finding all six identities
http://www.regentsprep.org/Regents/math/algtrig/ATT9/pythpractice.htm Practice Problems with answers
http://www.regentsprep.org/Regents/math/algtrig/ATT9/morepythag.htm Using Pythagorean Identities, the answers are given with step-by-step explanations
http://www.coolmath.com/precalculus-review-calculus-intro/precalculus-trigonometry/29-the-pythagorean-identities-01.htm Colorful notes for finding all six identities
http://www.regentsprep.org/Regents/math/algtrig/ATT9/pythpractice.htm Practice Problems with answers
http://www.regentsprep.org/Regents/math/algtrig/ATT9/morepythag.htm Using Pythagorean Identities, the answers are given with step-by-step explanations
Lesson Video
Pay attention to the following:
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