Question

Consider the following function.
f(x) = x sin x, a = 0, n = 4, −0.6 ≤ x ≤ 0.6
(a) Approximate f by a Taylor polynomial with degree n at the number a.

I found
T4(x) = x^2 -(1/6) x^4

I need help with part b
(b) Use Taylor's Inequality to estimate the accuracy of the approximation
f(x) ≈ Tn(x)
when x lies in the given interval. (Round your answer to four decimal places.)
|R4(x)| ≤ ??????