## Double Angle.docx - Section 1: Bell Work

Double Angle.docx

# Double Angle Identities

Unit 9: Trigonometric Identities
Lesson 11 of 14

## Big Idea: Trigonometric sum formulas are used to find double angle formulas for sine, cosine and tangent.

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Subject(s):
Math, double angle formulas, Trigonometric identities, PreCalculus
40 minutes

### Katharine Sparks

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