Will mark brainleast if SHOWN WORK!
Plsss I need help!?

(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.

Combine like terms to make a simpler expression 3z+z

Find two numbers if their sum is 91 and the ratio is 6: 7?