7.2 Double- and Half-Angle Identities

Comic of the Day

Tip: Another identity from the 1980s is the Star Wars Identity:



Warm Up and Questions from the Homework
a) Use the sum or difference identities to evaluate the exact value of sin105°
b) Determine the exact value of the following:



Announcements

• Next quiz Tue, Mar 19 (7.1 Basic Trig Identities, also see worksheets #1-3 on Moodle for extra practice on proofs)
• Next unit exam Thu, Mar 28 (55 minutes, in class)
• Summary of Studying (SOS) must be completed to write unit exam

Today - 7.2 Double- and Half-Angle Identities
Notes

Homework
7.2 #9-41
Worksheets 4 & 5 on Moodle

Tomorrow - 7.2 Continue Double-Angle and Half-Angle Identities

For more information

http://patrickjmt.com/half-angle-identities-to-evaluate-trigonometric-expressions-example-1/
http://patrickjmt.com/half-angle-identities-to-evaluate-trigonometric-expressions-example-2/
http://patrickjmt.com/half-angle-identities-to-evaluate-trigonometric-expressions-example-3/