find the exact value of sin (alpha + beta) if sin alpha = -3/5 and sin beta =-13/13, with alpha in quadrant 3 and beta in quadrant 4.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section: Chapter Questions
Problem 6RE
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find the exact value of sin (alpha + beta) if sin alpha = -3/5 and sin beta =-13/13, with alpha in quadrant 3 and beta in quadrant 4.

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