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Section 4.2.4 Working With Trig Identities
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Lesson Objective: Students will: Derive the other two Pythagorean identities. Verify trig identities.
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Recall: Pythagorean Identity
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4-107 a.
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4-107 b.
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Pythagorean Identities
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Verifying Trig Identities To verify an identity, transform one or both sides until they are identical. Be sure the transformation is only used on one side of the expression. i.e. Multiplying both sides by the same expression is not a valid step because both sides are changed.
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Ex 1: Verify the identity
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Assignment Pg 211 #4-111 to 4-118
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