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Do Now. Take out Extra Credit Assignment from Mrs. Cheung Reminder: Office Hours from 3:30 to 4:30pm Warm Up 1) Write down 3 Reciprocal Identities 2) Write down 2 Tangent and Cotangent Identities 3) Write down 1 Pythagorean Identity 4) Using known identities to simplify the following:.

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Do Now

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Presentation Transcript
Do Now
• Take out Extra Credit Assignment from Mrs. Cheung
• Reminder: Office Hours from 3:30 to 4:30pm

Warm Up

• 1) Write down 3 Reciprocal Identities
• 2) Write down 2 Tangent and Cotangent Identities
• 3) Write down 1 Pythagorean Identity
• 4) Using known identities to simplify the following:

Trigonometric Identities

Mr. Lopez

April 24, 2014

Students will be able to…
• Use algebra to simplify trigonometric expressions and to establish identities by applying the Reciprocal Identities, Pythagorean Identities, and Negative-Angle Identities.
Essential Questions
• What is an identity?
• How do we prove trigonometric identities?
• How do we simply trigonometric expressions?
Guided Practice
• 1) Prove the identity: (sec x)*(sin x) = tan x
• 2) Prove the identity:
• 3) Prove the identity:
• 1) Prove the second Pythagorean Theorem.
• 2) Prove the third Pythagorean Theorem.

Hint: Use the first Pythagorean Theorem.

Challenge:

3) Prove the following identity:

Math Fair!! ---30 min
• Get your handout from Wednesday