6. Trigonometric Identities and More Equations
Sum and Difference Identities
6:50 minutesProblem 38e
Textbook Question
Textbook QuestionIn Exercises 35–38, find the exact value of the following under the given conditions: β e. cos ------- 2 1 3𝝅 1 3𝝅 sin α =﹣ ------ , 𝝅 < α < ------- , and cos β =﹣------ , 𝝅 < β < ---------. 3 2 3 2
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