Did I get this answer right?

(a) compute the maclaurin polynomial m2(x) for f(x) = cos x. (b) use the polynomial of part (a) to estimate cos π 12. (c) use a calculator to compute the error made using the estimate from part (b) for the value of cos π 12. remember that the error is defined to be the absolute value of the difference between the true value and the estimate.

Can someone me and plz do the problem

Amachine part consists of a half sphere and a cylinder, as shown in the figure. the total volume of the part is π cubic inches.