No, that's not right. sin(x) is periodic so it does not have a true inverse. If we restrict x to between andthenwe have arcsin(x), the "principal" value, is its inverse. For example if f(x)= sin(x) and g(x)= arcsin(x), then . But if we define we have, for example, that also. You can continue doing that by adding or subtracting integer multiples of .