f(x)=sec(x), a=0, n=2, -0.4
<=x<=0.4
Approximate f by a Taylor polynomial with degree n at the number a.
T_(2)(x)= ?
Use Taylor's inequality to estimate the accuracy of the approximation f(x)≈T_(n)(x) when x lies in the given interval. (Round answer ro 6 decimal
places.)
|R_(2)(x)|<= ?