. True or False: For a trigonometric function, y = f(x), then x = f -1(y). Explain your answer. (1 point) 3. True or False: For a one-to-one function, y = f(x), then x = f -1(y). Explain your answer. (1 point)

4. True or False: For any function, x = f -1(y), then y = f(x). Explain your answer.

5. True or False: The graph of y = sinx is increasing on the interval ( pi/2 , 3pi/2)

. Explain your answer.