Given $f(x) =\frac { \operatorname { sin } x } { x }$:

1. Write an equation for $p_3(x)$ and use it to approximate $f(0.2)$.

2. Determine a bound for the error in your approximation from part (a).

   Hint (b):

   The next non-zero term in the approximation is:

3. Use your calculator to find the true error and compare it with your answer from part (b).