Question

If an equation is an identity, then how many solutions does it have?
zero
one
infinite

Answer 1

1

Answer 2

?

Answer 3

tax(x) = cos(x)/sin(x) would have infinite solutions

Answer 4

infinite, since it holds true for all variables

Answer 5

E.g. sin^2 x = 1 - cos^2 x has infinite # solution

Answer 6

tan(x) = sin(x)/cos(x) would have infinite solutions rather, is this what your asking?