Multiple Choice: The graph of $f(x) = x –\frac { x ^ { 3 } } { 6 } + \frac { x ^ { 5 } } { 120 } - \frac { x ^ { 7 } } { 5040 } + \frac { x ^ { 9 } } { 362880 } - ...$ best approximates which function near $x = 0$?