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November 7, 2012 Verifying Trig Identities

November 7, 2012 Verifying Trig Identities. Homework questions. HW 5.2: Pg. 387 #4-36, multiples of 4. Use factoring to simplify. Example 3: common factor difference of squares sin 2 x csc 2 x – sin 2 x b ) sec 4 x – tan 4 x. Use these strategies for HW #45-53 odd.

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November 7, 2012 Verifying Trig Identities

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  1. November 7, 2012Verifying Trig Identities Homework questions HW 5.2: Pg. 387 #4-36, multiples of 4

  2. Use factoring to simplify Example 3: common factordifference of squares • sin2x csc2x – sin2x b) sec4x – tan4x Use these strategies for HW #45-53 odd

  3. Lesson 5.2 Verifying Trig Identities Goal: Get one side of the equation equal to the other. Strategy: - Work on one side to make it equal to the other side.

  4. Great first step strategies! • Start with the side that seems more complicated: (fractions, common multiples, etc.) • Combine fractions – get a common denominator. • Substitute an identity before multiplying. • Convert everything to sine and cosine. • Write as separate fractions. • Work with both sides separately. (Do not add/subtract/mult/divide to both sides. • Factor

  5. Strategy 1. Start with the side that seems more complicated: (fractions, common multiples, etc.

  6. Strategy 2. Combine fractions – get a common denominator.

  7. Strategy 3. Multiplying (tan2x + 1)(cos2x – 1) = -tan2x

  8. Strategy 4. Converting to Sines and Cosines

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