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18 Verifying Trigonometric Identities
18 Verifying Trigonometric Identities In this section, you will learn how to use trigonometric identities to simplify trigonometric expressions. Equations such as (x 2)(x+ 2) = x2 4 or x2 1 x 1 = x+ 1 are referred to as identities. An identity is an equation that is true for all values of xfor which the expressions in the equation are de ned. For
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