Given the function f(x) = log3 (x + 1), determine f^−1(2).

Given:  f(x) = log3 (x + 1), look for f^-1 (2)

We are looking for the inverse of a function. The inverse of the function can be obtained by switching the variables and obtaining the values of the new function, before substituting f(2). Using a calculator:

f^-1 (2) = 8

Well, if the arc is 32.5 units, and the radius of the circle, and thus of the angle is 12, as you can see in the picture, then



and surely you know how much that is.