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Rewrite each of the following expressions using a single trigonometric function. You may wish to review your trigonometric identities from Chapter 1.

Common Trigonometric Identities



Angle Sum

Double Angle

  1. Double Angle identity (factor first).

  2. Sum and Difference (Angle Sum) identity.

  3. Factor first.

  4. Start by rewriting and as fractions.

    You will use more than one identity.