6. Trigonometric Identities and More Equations
Sum and Difference Identities
Problem 5.28a
Textbook Question
Textbook QuestionUse the given information to find sin(x + y), cos(x - y), tan(x + y), and the quadrant of x + y.
sin x = 3/5, cos y = 24/25, x in quadrant I, y in quadrant IV
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