6. Trigonometric Identities and More Equations
Sum and Difference Identities
8:01 minutesProblem 59
Textbook Question
Textbook QuestionIn Exercises 57–64, find the exact value of the following under the given conditions: a. cos (α + β) 3 1 tan α = ﹣ ------ , α lies in quadrant II, and cos β = ------- , β lies in quadrant I. 4 3
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