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Trigonometry
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OpenStudy (catscatscats):
Suppose sinA = 12/13 with 90º≤A≤180º. Suppose also that sinB = -7/25 with -90º≤B≤0º. Find sin(A + B).
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OpenStudy (catscatscats):
253/325 -204/325 323/325 -36/325
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