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OpenStudy (anonymous):
Suppose a triangle has sides a, b, and c, and let be the angle opposite the side of length b. If cos > 0, what must be true? A. a2 + c2 > b2 B. a2 + b2 = c2 C. a2 + c2 < b2 D. a2 + b2 > c2
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OpenStudy (anonymous):
I'm not sure now...
OpenStudy (mandre):
Angle opposite b < 90 so A must be the answer.
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