For positive acute angles A and B, commaB, it is known that sine, A, equals, start fraction, 8, divided by, 17, end fraction sinA= 17 8 ​ and cosine, B, equals, start fraction, 7, divided by, 25, end fraction, .cosB= 25 7 ​ . Find the value of sine, left bracket, A, minus, B, right bracketsin(A−B) in simplest form.