1) If A = {piano, guitar, violin) and B = (guitar, piano, violin) then B_______A

For the given two sets A and B, the set B is equal to A.Set:A set is the collection of well-defined objects or elements. It is represented by a capital letter symbol and the number of elements in the finite set is represented as the cardinal number of a set in a curly bracket {…}.Given.Here we have the two sets A =  {piano, guitar, violin) and B = (guitar, piano, violin) Now, we need to find the relation between  B and A.While we looking into the given sets,Set A has 3 elements in it andSet B has 3 elements in it.So, the size of both sets are equal.And now we have to looking at the elements in it.While we checking the elements, instead of the order both have the same elements.Therefore, the set B is equal to set A.To know more about Sets here.https://brainly.com/question/14893265#SPJ1