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5.4 Sum and Difference Formulas. In this section students will use sum and difference formulas to evaluate trigonometric functions, verify identities, and solve trigonometric equations. Section 5.4, Sum and Difference Formulas, pg. 368. Example 1 . Find the exact value of.
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5.4 Sum and Difference Formulas In this section students will use sum and difference formulas to evaluate trigonometric functions, verify identities, and solve trigonometric equations.
Example 1 Find the exact value of
Example 2 Find the exact value of
Example 3 Find the exact value of sin(u+v) given , where and where
Example 5 Prove the cofunction identity
Example 6 Simplify the expression. a. b.
Example 7 Find all solutions of in the interval