Closing the Lesson - Section 3: Share and Summarize

 
  Closing the Lesson
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What is cos(22.5°)?

Unit 5: Trigonometric Relationships
Lesson 8 of 15

Objective: SWBAT derive and utilize the half angle formulas for sine and cosine.

Big Idea: The cosine of 22.5° has to be related to the cosine of 45°, right?

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Subject(s):
Math, Precalculus and Calculus, Trigonometry, trigonometric functions (Simplifying), trigonemetric identities, half angle formulas, Trigonometric Equations
  50 minutes
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