8x+y=6
7x-1y=-4

solve using substitution

(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.

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.