I just need help awsering 1,2&3

(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.

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

At 6 1/2 cents per pound of string beans how much does 7 pounds cost