7.1 Sum/Difference Identities

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Warm Up and Questions from the Homework
Factor and simplify:
a) 
b) 

Hint (p. 53)



Announcements

• Next quiz Tue, Mar 19 (7.1 Basic Trig Identities)
• Next unit exam Thu, Mar 28 (55 minutes, in class)
• Summary of Studying (SOS) must be completed to write unit exam

Today - 7.1 Sum/Difference Identities
Notes

Homework
7.1 #51-75 (skip #63)

Tomorrow - 7.2 Double-Angle and Half-Angle Identities
Pre-read 7.2

For more information

https://www.khanacademy.org/math/trigonometry/less-basic-trigonometry/trig_iden_tutorial/v/proof--sin-a-b------cos-a--sin-b-----sin-a--cos-b
https://www.khanacademy.org/math/trigonometry/less-basic-trigonometry/trig_iden_tutorial/v/proof--cos-a-b-----cos-a--cos-b---sin-a--sin-b
http://patrickjmt.com/sum-and-difference-identities-to-simplify-an-expression-example-1/
http://patrickjmt.com/sum-and-difference-identities-to-simplify-an-expression-example-2/
http://patrickjmt.com/sum-and-difference-identities-to-simplify-an-expression-example-3/
http://patrickjmt.com/sum-and-difference-identities-for-sine-and-cosine-more-examples-1/
http://patrickjmt.com/sum-and-difference-identities-for-sine-and-cosine-more-examples-2/
http://patrickjmt.com/sum-and-difference-identities-for-sine-and-cosine-more-examples-3/