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Mathematics, 04.12.2019 19:31 DatxBoixMatt4766

Angle alpha lies in quadrant ii, and tan alpha = -12/5. angle beta lies in quadrant iv, and cos beta = 3/5. what is the exact value of cos(alpha-beta)?

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Angle alpha lies in quadrant ii, and tan alpha = -12/5. angle beta lies in quadrant iv, and cos beta...

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