PLZ HELP!! What is the difference between unit rates and rates are different.

(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.

3.4a=57.8 what is the the value of a

Given abc find the values of x and y. in your final answer, include all of your calculations.