In Exercises 73 and 74, use a graphing utility to graph f and g in the same viewing window to verify that the two functions are equal. Explain why they are equal. Identify any asymptotes of the graphs.
1. f (x) = sin (arctan 2x), g (x) = 2x / √1 + 4x2
2. f (x) = tan (arccos x / 2), g (x) = √4 - x2 / x