Mathematics, 18.10.2020 14:01 dyshekagraves

Given sin(u)=-7/25 and cos(v)=-4/5, what is the exact value of cos(u-v) if both angles are in quadrant III?

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Given sin(u)=-7/25 and cos(v)=-4/5, what is the exact value of cos(u-v) if both angles are in quadra...