X 3 View an example Get more help. E Find the exact value of cos (a-P), given that sin a- D cos (a - b) = (Simplify your answer. Type an exact answer, using radicals as needed. Use integers or fractions for any numbers in the expression) C R F V % 5 T G 6 B Y 2 1 and sin - with a in quadrant III and p in quadrant IV. H & 7 N U J 8 M K 9 O Clear all O P 0 *** Check answer +11 { ? I