P=Rs16000 , R=8% per year , T=2 years . Find compound interest compounding semi annually.

(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.

Anyone know? will mark brainliest if you're correct!

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