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Trigonometric Identities Section 4.3

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Objectives Use algebra to simplify trigonometric expressions Establish identities

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An identity is a mathematical relationship equating one quantity to another (which may initially appear to be different). An equation that is not an identity is called a conditional equation.

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Even-Odd Identities

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Page 243 #9

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Page 243 #11

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Page 243 #13

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Page 243 #19

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Page 243 #27

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Page 244 #53

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Page 243 (10-36 even) ====================== Pages 243-244 (38-60 even) ====================== Page 244 (62-88 even)

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5.1 Using Fundamental Identities. Fundamental Trigonometric Identities.

5.1 Using Fundamental Identities. Fundamental Trigonometric Identities.

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