Sum and Difference Identities

6. Trigonometric Identities and More Equations / Sum and Difference Identities / Problem 2

Problem 2

Express the following sum as one trigonometric function only. Then, determine its exact value by using a unit circle:
sin 68° cos 82° + cos 68° sin 82°

sin 14°; (√2)/2

sin 150°; 1/2

cos 14°: 1/2

cos 150°; -(√3)/2

Express the following sum as one trigonometric function only. Then, determine its exact value by using a unit circle:sin 68° cos 82° + cos 68° sin 82°