Use the cosine of a sum and cosine of a difference

Last updated: 7/15/2022

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 IV cos (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.)