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Use the cosine of a sum and cosine of a difference identities to find cos...

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Use the cosine of a sum and cosine of a difference identities to find cos (s+t) and cos (s-t).sin s=12/13 and sint=-4/5 s in quadrant II and t in quadrant IVcos (s+t) = (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)cos (s-t)=(Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)

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