If sin a = 8/17 and tan b = 7/24, find cos (a-b)

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10

If g^-1(x) is the inverse of g (x) which statement must be true

What is the measure of each of the two angles formed by the bisector of the diagonal of a rhombus if the original angle measures 58 degrees?