Dialation of 1/4 about the origin

(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 of the following quartic functions has x = –1 and x = –2 as its only two real zeroes?

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827