What is the period of the function shown in the graph? 21 2 7 & -5 -6 + -N 10 period = 4 -10 Enter your answer in the box. 10 11 12 13 How is domain of the function f (x) = COS X restricted so that its inverse function exists? Drag a value or interval into each box to correctly complete the statements. The domain of f (x) = COS X is restricted to [0, ] ,-1 all functional values of (x) = COS X are on the interval (-)[-] (0, ) 2 2 2 so that the inverse of the function exists. This means that [0, ] [0, ] (0, 2) [0, 2]