7. Non-Right Triangles
Law of Cosines
7:07 minutes
Problem 57
Textbook Question
Textbook QuestionIn Exercises 57–64, find the exact value of the following under the given conditions: a. cos (α + β) 3 5 sin α = ------ , α lies in quadrant I, and sin β = ------- , β lies in quadrant II. 5 13
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