I am really struggling with this question. please 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.

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

Which equation matches the graph shown ?