Use the properties of inverse functions to find the exact value of the expression, if possible. (Enter your answer in radians. If an answer is undefined, enter UNDEFINED.)

Question

cos^-1(cos(3𝜋/2))

= ______

Answer 1

The property of inverse functions is:

f^-1(f(x)) = f(f^-1(x)) = x

For this case, x = 3𝜋/2 radians