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
Section 5.4, Sum and Difference Formulas, pg. 368
Example 2 Find the exact value of
Section 5.4, Sum and Difference Formulas, pg. 368
Example 3 Find the exact value of sin(u+v) given , where and where
Section 5.4, Sum and Difference Formulas, pg. 368
Example 5 Prove the cofunction identity
Section 5.4, Sum and Difference Formulas, pg. 368
Example 6 Simplify the expression. a. b.
Section 5.4, Sum and Difference Formulas, pg. 368
Example 7 Find all solutions of in the interval