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25-05-2023
Mathematics

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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 sin t = 3/5, s in quadrant IV and t in quadrant II cos (s+t) = _____
(Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)

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