Find the length of side x in simplistic form with a rational denominator

Plzzz asap what is the inverse of f if f(x)=^3 sqrt x-5

(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.

If i have one apple and give you the apple, how many apples do i have?